How do you say her name, and where does it come from?

if-THEE-may. She says it herself the first time you meet her, if you would rather hear it than read it.

It is Greek, from the Odyssey: Iphthimé is Penelope's sister, and Athena makes a phantom in her likeness to comfort Penelope while she sleeps. We did not pick it for the sound. Why we picked it.