What's in a (sur)name?

This afternoon, I got a call from our telephone company. Here's how the conversation went..

Phone Guy : Hello I'm calling from the phone company, can I speak to Mrs. Aloo Potato (the phone is in her name)?

Me: This is her husband speaking, how can I help you?

Phone Guy: Is that Mr. Potato

Me: No this is Mr. Gobhi Cabbage

Phone Guy: (Clearly sounds puzzled) Mr. Gobhi Cabbage? Then Mr. Potato????

Me: Forget it, please tell me what's it about.... and the conversation went on...

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Now what do I tell the wife and Mad Momma? Are women the only ones who face this problem?? Hume bhi life mein fight hai !!!!