Cognomen Thanitsak (Thanitsak 
) , in all the world, is an extremely rare last name. Much more prevalently, Thanitsak is the forename as well as the last name.
Munrat, Tassanaudomsit, Nithipirayathakul, Witchukreangkrai, Chaikanarukkul, Pramoolpolthanaraj, Piyanunthikun, Ratthachotrungchat, Ratanaphram, Lertsakpariya, Thitasiriroj, Wuttipatsornpong, Sathirakunthanawat, Chaiwongrad, Thanaruangkiat, Thiraphatchai, Methachotsiwat, Suriyaprapat, Chaikittisin, Chatrakul Naayudhaya, Roongsawatthnakul, Wattanakomolpat, Lertsopacharoen, Rojsarankitti, Pudtipatkosit, Pokinwatcharakiat, Srirot, Pophijit, Narach, Sungsiri, Peratavewate, Phudmak, Rojsarunkitti, Jaikaithanawat, Vesassangworakarn, Anangkapan, Thitithanapongkul, Piyayosanun, Rungkrud, Ditthadanaiwat, Ditdanaiwat, Nimitvipawong, Metharatnatsiri, Sangakorn, Athiwongwat, Chanhuana, Booddawan, Patanawoarasith, Roogsawatthnakul, and Chatrakul Na Ayudhay