Thant had two sons, but lost both; Maung Bo died in infancy, and Tin Maung Thant fell from a bus during a visit to Yangon.
Thant có hai con trai song đều mất sớm; Maung Bo mất khi còn sơ sinh, còn Tin Maung Thant ngã từ xe buýt khi thăm Yangon.