"Abba! Father!" = Daddy???

Here's a quote that sharpens up something that I've heard more than once...

"...we oversentimentalize this word [Abba] when we refer to it as mere baby talk and translate it into English as 'daddy.'  The word Abba appears in certain legal texts of the Mishna as a designation used by grown children in claiming the inheritance of their deceased father.  As a word of address Abba is not so much associated with infancy as it is with intimacy." - Timothy George (Galations, 307)

 And, here's alot more information on the same topic: "FactChecker: Does 'Abba' Mean 'Daddy'?"
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For you did not receive the spirit of slavery to fall back into fear, but you have received the Spirit of adoption as sons, by whom we cry, “Abba! Father!”
(Romans 8:15 ESV)

And because you are sons, God has sent the Spirit of his Son into our hearts, crying, “Abba! Father!”
(Galatians 4:6 ESV)