Jacoba Regeer
- Born: 13 Jul 1833, Leiden, , Zuid-Holland, Netherlands
- Marriage (1): Isaac Delfos on 6 Jul 1859 in Leiden, , Zuid-Holland, Netherlands
- Died: 13 Jun 1927, Leiden, , Zuid-Holland, Netherlands at age 93
 Noted events in her life were:
• Occupation: Breister.
Jacoba married Isaac Delfos, son of Cornelis Delfos and Maria Hendrika Lagas, on 6 Jul 1859 in Leiden, , Zuid-Holland, Netherlands. (Isaac Delfos was born on 5 Jun 1832 in Leiden, , Zuid-Holland, Netherlands and died on 8 Feb 1900 in Leiden, , Zuid-Holland, Netherlands.)
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