In all the world, ธาดากุล (Tadakul , Tadakun , ธาดากุล ) is an extremely rare boy's forename. Likewise, ธาดากุล is the last name as well as the forename.
Thadagul, Thadakul, and Thadakun
นพพล, and บุญเพ็ญ
, Tadakun