Simplify the following text for a Grade 6 native English-speaking person.
Original: He was the illegitimate son of the wealthy Messer Piero Fruosino di Antonio da Vinci , a Florentine legal notary , and Caterina , a peasant .
Simplified: His father was a lawyer , Messer Piero Fruosino di Antonio da Vinci . His mother , Caterina , was a servant .