SEO, in fact "Seo" is also a Korean name.
Seo, sometimes romanized Suh or So, is a common Korean family name. The Seo clan in Silla was founded by Kim Alcheon.
Hangul (In Korean) Seo is 서.
Hanja (In Chinese) Seo is 徐 and also 西.
Let's see a list of notable people named Seo, Suh or So:
Seo Bongsoo, professional Go player
Seo Do-young, actor
Seo Dong-Myung, football goalkeeper
Seo Hee Kyung, golfer
Seo Ho-Jin, speed skater
Seo Hyo Rim, actress
Seo Hyuk-Su, football player
Seo In Young, singer
Seo Jae-pil, first naturalized Korean-American
Seo, Jae Weong, baseball pitcher
Seo Ji-seok, actor
Seo Ji Young, singer
Seo Joo-hyun, singer in pop band Girls' Generation
Seo Jung-kwon,birth name of rapper Tiger JK.
Seo Jung-Won, football player and coach
Seo Mi-Jung, fencer
Seo Min-jeong, actress
Seo Moon Tak, singer
Seo Taiji, musician
Seo Yoon-hee, badminton player
Anna Wallis Suh, Methodist missionary, American expatriate, North Korean propagandist
Do-Ho Suh, sculptor
Eun-Suh Park, antagonist in the Korean remake of the Japanese film Ringu
Maurice Suh, Korean-American lawyer
Suh Bok Sub, hapkido co-founder
Suh Chong Kang, first president of the American Tae Kwon Do Association
Suh In-Hyuk, martial artist, creator of Kuk Sool Won
Suh Jang Geum, the lone female Royal Physician in Korea's history
Suh Jiyoung, singer
Suh Nam Pyo, president of the Korea Advanced Institute of Science and Technology
Suh Sang-Chul, economist, educator and administrator
Suh Yun-bok, marathoner
Sung-In Suh, boxer
Susie Suh, Korean-American musician
The source: Wikipedia.