well the truth is.. from what I heard from my family.. it was de piombo.. which I believe was italian then my great great great great great great lol not sure how many greats in there grandfather came to colombia and changed it to de pombo to make it easier, and as the time went by they took the de away from it.. and it just became pombo.. my grandfather was roberto murillo pombo without the de.. like rafael pombo de famouse poet was just pombo and not rafael de pombo..
he was my grandfathers great uncle..