About the Isenberg surname
The surname Isenberg has a primarily toponymic formation. The surname form is consistent with German naming traditions, in which occupations, places, and personal names are common sources. In this type of surname, the name first located a person in relation to a place before becoming hereditary. Families bearing the same surname may nevertheless come from different places when more than one locality produced a similar name.
Pronunciation:
I-zan-bèrg/izɑ̃bɛʁɡ/