I've known quite a few Maurices in the UK, but over here we pronounce it Morris. The few times I've heard of an American Maurice it's been pronounced Moreece.
Names do run in families - over the last 250 years most of the men in my father's family have been William, Richard, Robert or Francis (Frank), but there have also been no fewer than 13 Moses! My dad's cousin was the fifth consecutive generation of Moses. And Elizabeth, Mary and Jane account for a good proportion of the women.