I have information about the Omstead family connection.
Omstead, Anna Alice (daughter of Moses and Alice (McCortney) Omstead), born at Windham Twp., Norfolk Co., Canada West on 14 Jun 1846, died on 28 Jun 1915. She married James Casey (son of Ryan and Mary (Smith) Casey; widower of Martina McDonald), born in Ireland on 25 Mar 1848, died in 1936. They were buried in LaSalette Cemetery, Windham Twp.
Omstead, Moses (son of Jonas and Hannah (Woodley) Omstead), born at Townsend Twp., Norfolk Co., Upper Canada c. 1804, died on 30 Sep 1894. He married on 22 Nov 1841, Alice McCortney, born in Ireland in Nov 1818, died on 29 Feb 1892 ae 73y 3m. Alice was buried in LaSalette Cemetery, Windham Twp.
Omstead/Olmstead, Jonas (son of Gideon and Elizabeth Omstead), born in the American Colonies on 24 Nov 1778,1 died at Townsend Twp., Norfolk Co., Upper Canada on 24 Nov 1819. He married Hannah Woodley (daughter of George and Christina (Wegers) Woodley), born in New Brunswick on 22 Mar 1786, died at Townsend Twp on 20 Jan 1847 ae 60y 10m. Hannah was buried in Boston Baptist Church Cemetery, Townsend Twp.
Omstead/Umstead, Gideon, born in the American Colonies est. 1760, died at Townsend Twp., Norfolk Co., Upper Canada in 1797. He married Elizabeth Cooley (daughter of Gideon and Elizabeth (Osborne) Cooley), born at Brimfield Twp., Greenwich Co., Massachusetts on 3 Nov 1761, died at Lyme Twp., Huron Co., Ohio in 1827.