I've heard of some husbands taking their wives name as the first half of a hyphenated name: herlastname-hislastname. The only example I can think of right off is Julian Fellowes.
http://en.wikipedia.org/wiki/Julian_Fellowes On 28 April 1990, he married Emma Joy Kitchener ... and assumed the name Kitchener-Fellowes by deed enrolled with the College of Arms in 1998.
