Probably Moshe Hirsch would be Henry, just because of the H initial. Ignoring the Moshe as 'too Jewish', since immigrants typically want to merge with the wallpaper, a popular English H name would look attractive when he needed to change.
Angia totally baffles me! I could have made a rather trite Angia = angel = bright object in the sky = Esther, especially if she died young ... but not if she died too young. (All those sisters, and not one of them a Chana! That would have worked ...) How very interesting!