You know, I could use the old joke and say Fauchja is pronounced "SMITH", all the consonants are silent, but I won't. I got the name from a line in Arlo Guthrie's Alice's Restaurant, "Alice didn't live in the restaurant, she lived in the church tower with her husband Ray and Fatcha the dog." I named my dog that, and then decided to go with the weird spelling. I'm not sure how you think it should be pronounced.
Fauchja