To accommodate all My children who are sincerely carrying Me, with love, in their hearts in these times, and to avoid the never-ending conflict among the hard-headed among you, it is referred to Me in all these writings, as instructed by Me, mainly as Father, Creator, or Savior. Abba is the Hebrew word for Father and by calling Me Abba Father, you are confirming My Fatherhood from Hebrew in your own language.
Different to your modern-day custom of giving your children mostly names that sound beautiful, the people of ancient times gave a child a more descriptive name which tells considerably more about his background, religion and even region, and many a time such a child was brought up in such a way that he could do is name justice. Many a Jewish parent later relied on the temple, and at a price which was not insignificant a child was given a name by priests.
One of the reasons for My coming in those days was precisely to come and free man from the inhuman temple doctrines and rules and therefore My Name was conveyed directly to My earthly guardian (Joseph) and the meaning and details regarding My Name any experienced student of scripture will be able to state accurately. The ancient form of writing of those days and your current alphabet has few similarities, therefore do not trouble your heads too much about the, to you so important, spelling of My Name, but rather think about it, that it is possible for an identity to change a name, but never can a name change an identity.