Pieter Frederich Dahler (21 February 1883 – 7 June 1948), more commonly known as P.F. Dahler or Frits Dahler, was one of the leading Indo (Eurasian) politicians and activists advocating integration of the native Indo-European community into the indigenous society of the Dutch East Indies (now: Indonesia). After World War II he changed his name to Amir Dachlan. Together with E.F.E. Douwes Dekker, he was a strong political proponent of association between Indo-Europeans and Indonesians in the colonial Dutch East Indies and early post-colonial Indonesia.