What is the term of endearment for your father?

"Da" or "Da" is fine.

The way the locals call him:

Men in the village who are in the same generation as dad but younger than dad are called uncle in most places, or da in Henan. Dad if there is only one brother, then directly two da, if there is more than one brother, in order next: two da, three da. Rural Henan also called the father's brother for two dad, three dad. There are no certain rules, are in accordance with their own local habits handed down.

In Luoyang around is the meaning of uncle, the father's brother called "Bo", the father's brother called "Da", also called "Da's", and in Luoyang, Xuchang, Luohe also have a Xuchang, Luohe also have the father called "da", Henan accent is not the same, Yuandong how to call it do not care, but Yuandong people speak to hear some soft quite good to hear.