A variant of Kfir is Kiefer (Hebrew).
Kfir is not popular as a baby boy name. It is listed outside of the top 1000.
Baby names that sound like Kfir include Kabyr, Kahpar, Kaspir, Kupar, Kupur, Kupyr, Cabrere, Coopir, Xabiere, Kabar, Kabear, Kabeer, Kabeir, Kabir (Arabic and English), Kahper, Kapar, Kaper, Kaspar (Czech and German), Kasper (Polish and English), and Kaspor.
† approx English pronunciation for Kfir: K as in "key (K.IY)" ; F as in "fee (F.IY)" ; ER as in "hurt (HH.ER.T)"