Cornelius Ackerinterests me as I am related to the Acker family of Hastings County Ontario that were originally Eckhardt from Beekman Patent, Dutchess County New York. My gggg grandmother was Caty, daughter of Adam Acker ( changed his name ) born 1751 that lived in Hamilton Twp . There are two Upper Canada Land Petitions for Acker. Rebecca Acker of Clinton twp Ontario for 1807 and Cornelius Acker 1819 York.I have not seen the microfilms. The Cornelius Acker may be related to your Cornelius Acker. The son Adam Acker of your Cornelius I believe died 18 Nov 1898 in Middlesex County and was probably married to an Elizabeth Warden on 8 Feb f1f869 in Bayham Twp Elgin County Ontario. He was born 1836 time frame although the marriage says 1844.