Sarah - I like this, don't think I'd use it though.
Sarai - I don't really know how to pronounce it but it looks pretty.
Hagar - All I can think of is the Ahaggar/Hoggar mountains in the Sahara.
Abraham - one of my new loves, and the nn
Bram is so cute.
Abram - prefer
AbrahamIsaac - don't like it.
Ishmael - makes me think of whales and the Sea Captain out of The Simpsons.