You descend from my gggf's bro., so we are distant cousins.
Robert, Joseph and Richard plus MAYBE Thomas and William Cooke came over i nthe 1820s. My gggf was Robert Cooke of Brockville. I have sent an email to your given address with more detail.
This Cooke clan were of County Cavan, Ireland.
The Lockhart name features from my childhood. Rev W Lockhart was a beloved minister at Kingsway Lambton U C during my early years ...I was pals with his son David...
Rev Lockhart became principal of United College, Winnipeg which later was U of Mb.