The family name Joon is written with only one hanja, meaning (俊). The 2000 South Korean Census found 72 people with this family name. All belonged to one bon-gwan, from Cheongju.[1]
There are 34 hanja with the reading "Joon" on the South Korean government's official list of hanja which may be used in given names; the more common ones are listed in the table above.[2]
A few names containing this syllable have been popular over the years. Jun-young and Joon-ho were popular names for newborn boys in the 1970s through 1990s.[3] In the late 2000s and early 2010s, more names containing this syllable became popular, including Min-jun, Jun-seo, Ye-jun, Hyun-jun, and Seo-jun.[4][3]