Jeremiah Concilor was born in Kent County DE. He was the son of Elijah Concilor and his wife, Hannah Durham, daughter of John Durham .

Jeremiah first appeared in the 1798 Little Creek Hundred taxables as a minor although he may have only been taxed on goods he kept in Little Creek Hundred. He was quite probably living with his parents in Duck Creek Hundred at this time. Jeremiah also appeared on the 1800 Delaware Federal Census records.

Jeremiah and his mother, Hannah Durham Concilor, were named administrators on the estate of his father on December 29, 1801.

Jeremiah Concilor died in 1811 and Letters of Administration on his estate were granted to his widow, Elizabeth, and his brother Elijah on April 29, 1811. His estate was valued at $731.48 and the accounts mentioned:

• Jesse Dean (son-in-law), John Durham (brother-in-law), John Voshall, Benjamin Sisco, William Sisco and Abm Pierce

Known children of Jeremiah and Elizabeth were:

• Hester/Esther Concilor (d. 1840)
  
• Hannah Concilor who married Perry Cork
  
• Elijah Concilor (d. before 1864)
  
• Henrietta/Harietta Concilor (died under age without issue)
  
• Jeremiah Concilor (died under age without issue)
  

After the death of her husband in 1811 and by February 3, 1814, Elizabeth Concilor married her brother-in-law Elijah Concilor. She remained married to him until his death in 1826. They appeared together in the 1820 DE Census records and in the 1824 tax lists living in Little Creek Hundred.

We have no information on Elizabeth Concilor after this time but there is an interesting note in the will of Jesse Dean who died in 1739. Jesse was living on the Dean family farm which closely adjoined the lands of both the Concilors and the Durhams in Little Creek Hundred. In his will, Jesse left to Elijah Concilor a pieced quilt made by his mother, Jesse's last wife. He does not mention this wife by name but the only Elijah Concilor I can find still alive in Kent Co. in 1739 was the son of Elizabeth and her first husband, Jeremiah, so it is possible that after the death of her second husband, Elijah Concilor, Elizabeth married Jesse Dean.

If this is the case then it produces another interesting note: Jeremiah and Elizabeth's daughter, Esther Concilor, married a Jesse Dean in 1814 but that Jesse (relationship to our Jesse still unknown) died prior to 1818 when Esther married Elisha Durham. It would be a curious fact that mother and daughter both married men named Jesse Dean.