Q: Visit visa for Dubai.
A: The surname does not matter as long as you have proof how you both are related. The requirements to sponsor a relative on a visit visa are as follows: http://www.gulfnews.com/uaessentials/residentsguide/family_life/10113285.html The deposit (not bond) is refundable and does not have to be paid when a visit visa will get renewed. Take care.