Family name ถนอมวุฒิ (ถนอมวุฒิ 
, Thanomwut ) , in the world, is a very rare cognomen. The surname ถนอมวุฒิ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, ถนอมวุฒิ is the forename as well as the last name.