Jhr. Petrus Adrianus Cornelis Maria Van Haeften
- Born: 11 Dec 1832, Arnhem, Gelderland, Netherlands
- Marriage (1): Henrietta Diederika Coops on 5 Sep 1867 in Doetinchem, Gelderland, Netherlands
- Died: 14 Mar 1908 at age 75
 Noted events in his life were:
• Occupation: notaris: Vorden, Gelderland, Netherlands.
Petrus married Henrietta Diederika Coops, daughter of Derk Hendriksz. Coops and Diderika Johanna Coops, on 5 Sep 1867 in Doetinchem, Gelderland, Netherlands. (Henrietta Diederika Coops was born on 30 Jul 1838 in Doetinchem, Gelderland, Netherlands and died on 18 Sep 1927 in Vorden, Gelderland, Netherlands.)
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