Hhahahaha!! How can you tell the difference beta? By a name? So funny you are!! I am most amused. Well the matter is that you only know by a name, is it not as if anyone can make out if we are Hindu or muslim only by looking at them, unless it’s a name or a particular attire. Hilarious!! There is nothing wrong in being married to any caste person, its just very difficult to maintain. So do it ONLY if you can maintain it.