Papa (French, Spanish, Italian, Russian, Swedish, Norwegian, and many others) - The ultimate classic.
Papi (Spanish, Italian (especially in the south) and various Creole languages) - Very affectionate, similar to "Daddy."
Papou (Greek) - An affectionate version of Papas (dad/father).
Papá (Spanish, Read more… pronounced with a stress on the second syllable)
Papachka (Папочка - Russian) - A diminutive, meaning "little Papa" or "dear Papa."
Variations of "Baba"
Baba (Turkish, Persian, Swahili, Arabic, Mandarin Chinese) - Often used affectionately.
Babbo (Italian, especially in Tuscany/Florence) - A charming, regional word for father.
Aba (אַבָּא - Hebrew) - A very common and warm term for father/dad.
Other Sweet Options
Tatko (татко - Bulgarian) - A sweet word for "Dad."
Tata (Croatian, Romanian, Polish, Czech, Welsh) - A common, informal term for father.
Ocko (Slovak) - A diminutive, similar to "daddy."
Tatay (Filipino/Tagalog) - A common, informal and loving term for Dad.
Vati (German) - An affectionate, diminutive form of Vater (father), similar to "Daddy."
Apu (Hungarian) - An informal, loving word for Dad.