Allan P. Duncan, of Langhorne, died on Thursday, July 21, 2011 at home. He was 60. Born in Philadelphia, Allan has been a long time area resident. He was an artist as a hobby and also enjoyed playing his guitar. Allan was the son of the late Allen J. and Margaret M. (Krammer) Duncan. He is survived by his son Allen D. Duncan; his sister Barbara Dobson and her husband Thomas; nieces and nephews Danielle Agostino, Kevin, Christina and Hollie Dobson; an aunt and numerous cousins. Services are private at the convenience of the family.