Help with the origin of some surnames

[Ivorix]

Hello i wanted ask if someone knows the origin and meaning of these surnames i found in my paternal side: Salt, Boil ( i think it can be french ), Niget (French?), Juey, Siger, Duart and Artus


All of them found in my paternal side (Aragon and Valencia and some Frenchs)



Thanks in advance.