RE pn, for people who are commenting: it's pn differently in different countries. Certain Scandinavian countries pn it Life, some Lafe. In the UK (and I think only certain small areas elsewhere) it's pn Leaf.
I like Leif. I would pn it Leaf, but I would certainly accept Lafe. I think Life sounds silly, tbh.
If you want to change the spelling (which I don't think it necessary) I'd go for Lafe or Layf (which is kinda feminine). Laif looks like Life.