$ is a symbol of money

It refers to the middle name, a Jewish or Muslim custom, but somewhat outdated in Europe. The middle name is usually the name of the father. This custom is still around in the Arab world (and Israel maybe) and in Arab communities around the world, but most Jewish communities in Europe choose a random middle name for their kids these days. patronymic = from the father

A patronym is a component of a personal name based on the name of one's father, grandfather or an even earlier male ancestor.