Yip, well done. It's Ootmarsum, the town where I was born and returned to live in.
I got permission from local government (after payment) to use this sign on the worldwide internet. I'm promoting this lovely city by doing so.
That's what I thought of first but after searching on the net I was unable to confirm it - so I opted for the surname answer. Nice coat of arms. Here's my birthplace coat of arms (St. Helens, Merseyside):