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Timothy, who spelled the name Culver, was first cousin to my seventh Great Grandfather Jabez, who always spelled the name Collver. Both took their families from NJ to Norfolk Co, Ontario, in 1794. Four of Timothy's daughters eventually married four of Jabez' sons, and became popularly known as "the double Collver/Culver Quartet". I have visited the graves of Timothy and family, all buried in the St. John's Anglican Church burial ground in Woodhouse Township (six miles S of Simcoe, Ontario). Several of the Sovereign/Sovereen Family also migrated to Norfolk County, although Timothy and Martha had been married (and all of their children born in) New Jersey.
Refer you to "Pioneer Sketches of Longpoint Settlement" which includes a chapter re the Sovereign families who migrated to Canada. Available from Norfolk Historical Society, along with much other information at website www.norfolklore.com