I'm not positive if this is the same Jacob Cozad, but I have been researching Job Cozad. I have a brother of Rev. Job Cozad [who was born in 1769] by the name of Jacob along with 7 other siblings. Job was born in NJ and married in West Va. This could be the family you are looking for. I have this family traced back through NY, to Holland to France as far as 1595. I have a Levi but he was born in 1828 in Ohio. I do not show an Amy Cozad, but that could have been another line. The dates for brothers Job and Jacob would be about right. If you would like more info [parents and farther back] let me know. Meanwhile I will try to find where I found this info. in case there is something on Jacob's line.