In the bible you will find three names (besides DAVID):
1. DODAYAHU: "loved by Yah, friend of Yah" 2. DODAY: (same) 3. DODO: probably a short form of 1 (-o being a very rare ending with Hebrew names)
The vocabulary word "dod" means "uncle", but the older meaning is "friend, beloved one". It's origin is assumed to be an affectionate baby babble word with no specific meaning ("Ah, my little Dododo …" or something like this).