I have seen quite a few people with Pandey (Mangal Pandey) and Pandya as surname. They are all not Tamilians. But people from UP and Bihar. Are they in anyway related to the Madurai Pandiayarkal.
PS: There is even a Nalbandiyan (Tennis Player) in Argentina ;-)))
David Nalbandian was actually Draavida Nallapaandiyan.. his ancestors were from one of the obscure branches of the pandyas who, before Lemuria went under the sea, swam across the small river channel then connecting Lemuria to South America.