Why is the surname "Toews" pronounced as "Taves"?

Question:

Why is the surname "Toews" pronounced as "Taves"?

I knew a Toews in school. Also, there is a Conservative MP in Ottawa named Toews, as well as a key player on the national Junior hockey team is named Toews (who helped us beat the US to go to the gold medal game)

Best Answer - Chosen by Asker: Because it is Welsh in origin.