[Facts] Re: Looking for the meaning of name : Seifer; german in origin
According to Hanks & Hodges…
As a Jewish surname, Seifer may be derived from the surname Soper, indicating someone who manufactured soap. The name reflecting the Yiddish pronunciation of "soap".
Seifer is more likely, however, to be a derivation of Siegfried, a German name combining the elements of "sigi" ("victory") and "fridu" ("peace").
-- Nanaea