GatchalianFilipino, Tagalog From a Hispanicised spelling of Gat Sa Li-Han, a Chinese title meaning "lord of Li-Han". It was used by the rulers of Li-Han, an ancient Philippine state that was located in the present-day city of Malolos.
GatdulaFilipino, Tagalog This surname honors Lakan Dula, the last ruler of the Kingdom of Tondo, via his alternative name Gat Dula. In it, the word or prefix Gat is a shortened version of the Tagalog honorific Pamagat, which at the time meant "nobleman," while Dula possibly means "palace." Altogether, it means "Nobleman of the Palace."
GatmaitanFilipino, Tagalog From a Hispanicised form of Gat Maitan, a title meaning "lord of Mait" that was used by rulers of an ancient place named Mait or Maitan.