no
The person could be known as a painter or as an artist.
John Taylor - painter - died in 1651.
Frederick Walker - painter - died in 1875.
A patron commissions works from the painter of his choice, so the painter can earn his living.
Mark P. Painter was born in 1947.
P. Painter has written: 'Erla uterungen zu Heinrich Mann'
Picasso
no
If Salas is the name of a place, there is no plural but the possessive case can be made for Salas's... e.g. Salas's schools, Salas's aging population.
Painter
Piccaso
Hank Salas's birth name is Enrique Salas.
Adolfo Salas's birth name is Adolfo Domnguez Salas.
Marina Salas's birth name is Marina Salas Rodrguez.
Rex Salas's birth name is Rex Alan Salas.
Stephanie Salas's birth name is Stephanie Salas Banquells.