Documented evidence reveals that Leon Guerrero clan has been present in Guam as early as 1718. Those with the Leon Guerrero surname are found in Guam and the Commonwealth of the Mariana Islands continuously since that time. The Leon Guerrero surname is also found in much smaller numbers in the Philippines and Spain. It is assumed that this surname is also found in Mexico. This project provides a central place for those from the Leon Guerrero clan to research their origins and define their familial relationships. It is open to anyone with Leon Guerrero heritage.