For Gilsbach there are 14 on Yasni with different names.
Among the most common last names on Yasni Gilsbach is on position 4513.
Possibly. from the Low German: Yellow river. The name Gilsbach is often found in the Sauerland region, which largely consists of Schifergebirge. For long-lasting rain, sulfur washed and rinsed in the "Lenne", which then results in yellow water. Accordingly, the Gilsbach is someone who lives at the yellow river. (At least the Erklärungsveruch one of my former teachers).
(Sent from: Peter Gilsbach)