Felipe Buencamino y Siojo was an infamous Filipino turncoat, lawyer, diplomat, and politician. He fought alongside the Spaniards in the Philippine Revolution but later switched sides and joined Emilio Aguinaldo's revolutionary cabinet. He was a member of the Malolos Congress and co-authored the Malolos Constitution. He was also appointed as Secretary of Foreign Relations in the cabinet of Aguinaldo. After he left the revolutionary government, he co-founded the Federalista Party and became a founding member of the Philippine Independent Church.