Faster really interests me. I like the obvious Father's Sister compound, but beyond that it sounds like the English word "foster." Foster parents, foster home, etc. Maybe this word originated from earlier languages where it was custom to give the children to the father's sister in case the parents couldn't tale care of them. I'm going to look into this.
Shouldn't Papa be acceptable for Pappa, and Mama for Mamma? Papa/Dad/Father are pretty much interchangeable here in America, as are Mama/Mom/Mother. The only difference really is that Mother/Father can be perceived as slightly more formal, while both M/Papa and M/Dad are both decidedly less formal.