Allard Pierson
- Born: 1 Nov 1770, Gouda, Zuid-Holland, Nederland
- Christened: 2 Nov 1770, Gouda, Zuid-Holland, Netherlands
- Marriage (1): Maria Catharina van der Steen on 23 Jul 1797 in Leiden, Zuid-Holland, Netherlands
- Marriage (2): Johanna Elisabeth Gregory on 23 Jul 1797 in Leiden, Zuid-Holland, Netherlands
- Died: 31 Mar 1836, Alkmaar, Alkmaar, Noord-Holland, Netherlands at age 65
Allard married Maria Catharina van der Steen on 23 Jul 1797 in Leiden, Zuid-Holland, Netherlands. (Maria Catharina van der Steen was born on 25 Apr 1769 in Leiden, Zuid-Holland, Netherlands, christened on 27 Apr 1769 in Leiden, Zuid-Holland, Netherlands and died on 12 Jan 1799 in Leiden, Zuid-Holland, Netherlands.)
Allard next married Johanna Elisabeth Gregory, daughter of Jan Lodewijk Gregory and Johanna Gerarda Tack, on 23 Jul 1797 in Leiden, Zuid-Holland, Netherlands. (Johanna Elisabeth Gregory was born on 26 Mar 1770 in Amsterdam, Noord-Holland, Netherlands, christened on 1 Apr 1770 in Amsterdam, Noord-Holland, Netherlands and died on 2 Nov 1846 in Alkmaar, North Holland, The Netherlands.)
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