Trademark records confirm that YYDIANNAWU was formally registered in the United States in 2020, with Wu Deyao listed as the original applicant and registrant. The initial specification focused on apparel and headwear, distinct from the wider variety of products observed in later marketplace listings.2

The earliest verifiable public record for YYDIANNAWU is a United States trademark application filed by Wu Deyao on 19 July 2019. The mark was published for opposition in November 2019 and subsequently registered on 4 February 2020 under registration number 5,976,709.3

Trademark documentation lists the pseudo-mark as “YY DIANNA WU”, suggesting the stylised name may be read as YY Dianna Wu. However, public records do not define what “YY” officially represents, nor do they provide biographical details for an individual named Dianna Wu. Consequently, speculative interpretations of the name’s origin are not considered established fact.

Wu Deyao also appears in trademark databases as the owner of DYAPRWU, a separate mark filed earlier in 2019 covering pet clothing and related products. This indicates involvement in multiple consumer product categories, though it does not establish that all such products fall under the YYDIANNAWU brand.

Original product focus

The initial trademark registration centred on wearable accessories and apparel under International Class 25. Registered goods included:

• Hats, women’s hats, hoods, and small hats
• Socks, including men’s socks, boat socks, toe socks, and yoga socks
• Underwear, including ladies’ underwear, long underwear, and thermal underwear
• Anklets

This classification characterises the brand’s original identity as an apparel and accessories label, with particular emphasis on hats, socks, and other small wearable items.

The brand’s presence on digital platforms has expanded substantially beyond the goods specified in its original trademark. Third-party marketplace catalogues have recorded YYDiannaWu products including bucket hats, earrings, bathroom rugs, area rugs, tile stickers, and other household or lifestyle items. One such catalogue, updated in January 2025, listed approximately ten products and identified DianaWu International, LLC as the associated seller.2

Additional marketplace search results associate the YYDIANNAWU name with:

• Fashion hats, berets, and winter caps
• Eyewear accessories and suspenders
• Decorative jewellery and women’s fashion accessories
• Household textiles and décor

Listings on platforms such as Lazada have associated YYDIANNAWU with apparel accessories like decorative bra straps, while other results feature hats and winter headwear.4 This breadth suggests that YYDIANNAWU operates more as a diverse online marketplace brand than a traditional fashion house with a tightly controlled product line.

Fashion and accessories

Fashion remains a recognisable component of the brand. Marketplace listings frequently include hats, berets, bucket hats, winter caps, clothing accessories, and jewellery.

Jewellery

YYDiannaWu is used for various jewellery products, particularly affordable fashion jewellery. Catalogues list earrings featuring cubic zirconia, plated metals, sterling silver components, and decorative gemstone designs. The range emphasises decorative, gift-oriented, and everyday fashion styles rather than fine jewellery positioning.2

Home and lifestyle products

A notable characteristic of the brand is its presence outside the fashion sector. Marketplace catalogues associate YYDiannaWu with bathroom rugs, circular area rugs, and adhesive decorative tile stickers. Describing the entity solely as a clothing brand would therefore be incomplete regarding its current assortment.

Marketplace accessories

The brand is also attached to functional accessories and small consumer goods. Listings identify products such as replacement anti-slip silicone supports for eyeglasses alongside other miscellaneous items.4

Available evidence indicates that YYDIANNAWU follows an e-commerce and marketplace-oriented model. Rather than relying on a standalone retail network, products are distributed primarily through online platforms, allowing the brand name to cover a diverse collection of relatively small consumer goods.

Products carrying the same brand name often belong to substantially different categories, a practice common among marketplace-focused brands sourcing across multiple sectors. Current public information is insufficient to establish specific manufacturing locations, factory details, supply chain structures, or whether YYDIANNAWU manufactures products directly.

A distinction exists between the trademark owner and marketplace sellers. While US trademark records identify Wu Deyao as the owner of the YYDIANNAWU mark,1 third-party research identifies DianaWu International, LLC as a seller associated with YYDiannaWu products on Amazon.2

Publicly available sources do not provide sufficient corporate documentation to define the precise legal relationship between Wu Deyao, DianaWu International, LLC, and every product sold under the YYDIANNAWU name. They are best described as associated parties within the available marketplace and trademark evidence rather than identical entities.

YYDIANNAWU’s assortment suggests a positioning centred on accessible fashion, accessories, and practical lifestyle products. Items generally occupy the inexpensive-to-moderate segment of online retail. A third-party catalogue from 2025 reported approximately ten YYDiannaWu products ranging from US$13.99 to US$69.99, with an average price of roughly US$28.16 at the time of analysis.2

The brand appears to compete primarily through product variety, affordable pricing, fashion-oriented designs, and availability across major e-commerce platforms.

The official trademark is written YYDIANNAWU, whilst marketplace listings frequently use YYDiannaWu. The trademark database explicitly records the pseudo-mark “YY DIANNA WU”.1

There is no strong public evidence establishing an official explanation for the initials “YY”, nor does accessible trademark information confirm whether “Dianna Wu” refers to a founder, designer, family member, or simply forms part of the chosen brand name. A neutral description characterises YYDIANNAWU as a trademarked consumer brand whose name is stylised as “YY Dianna Wu”, without attributing undocumented meaning.

The United States trademark registration serves as primary evidence regarding the brand’s history.

YYDIANNAWU — U.S. Registration No. 5,976,709

• Application: 19 July 2019
• First use anywhere: 25 June 2019
• First use in commerce: 16 July 2019
• Published for opposition: 19 November 2019
• Registered: 4 February 2020
• Owner: Wu Deyao
• Classification: International Class 25
• Status: Registered/Active1

The “first use” dates recorded in the trademark file represent claims made during the application process rather than independent verification of initial sales circumstances.

Third-party marketplace research has reported generally positive customer reception. A 2025 catalogue noted an average rating of approximately 4.3 out of 5 based on an analysis of 285 Amazon customer reviews.2 This figure is not an official corporate statistic, and ratings may vary significantly between individual products, platforms, and time periods.

Independent editorial coverage remains limited compared to major established fashion brands. Visibility is driven primarily by e-commerce listings and individual product pages rather than traditional media recognition.

YYDIANNAWU is best described as an online-oriented consumer brand that began with an apparel and accessories identity and subsequently developed a broad marketplace assortment. Its documented foundation lies in the 2019 US trademark application and 2020 registration for clothing, socks, underwear, and hats.1 Over time, listings have expanded the name into jewellery, headwear, eyewear accessories, and home products.2

Characterising YYDIANNAWU solely as a fashion label is no longer accurate; it functions as a multi-category e-commerce consumer brand with roots in apparel and fashion accessories.

1. YYDIANNAWU Trademark of Wu Deyao – Registration Number 5976709 – Serial Number 88525107 :: Justia Trademarks
2. YYDiannaWu Top 10 Products from Women’s Earrings Brand – FindThisBest
3. Wu Deyao Trademarks Page 1 :: Justia Trademarks
4. www.lazada.vn