Last name Boonhan (Boonhan 
) , throughout the world, is a rare cognomen. The cognomen Boonhan is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, Boonhan is the forename as well as the last name.
Sila, Preeyapat, Boonthong, Banjongnee, Sangravee, Tanwarat, Prapapon, Prakaipim, Kittisak, Kanchana, Chadamas, Soontree, Songtham, Sittisak, Sansanee, Thanatpat, Watsana, Jarupat, Puwakorn, Bunyawi, Chaiwut, Songsak, Jirapa, Guykoh, Paisan, Bundol, Banyen, Amporn, Anong, Sawai, Thow, Jaruwan, and Rachchawong