Family name Lyoo (Lyoo 
) , worldwide, is a very rare last name. The surname Lyoo is habitual in Singapore, where it is a very rare surname, Australia, and the United States, where it is an extremely rare surname. Likewise, Lyoo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lyoo | Australia, China, India, United States, Singapore |
| chul hyoung lyoo researcher |
|
|
| heyrhyoung lyoo researcher |
|
|
| won seok lyoo researcher, Yeungnam University (KOR) |
|