There certainly are more than one Andrew Jackson Isaac(k)s. In my Isaacs' files I have four Andrew Jacksons and four Andrew Isaacs with no middle name (yet). Three of my Andrew Jacksons were born in 1819, 1836, and abt 1875 - all in Kentucky. For one Andrew Jackson I have no date or birthplace. He married Mary Jane Isaacs in 1833 in KY.
As for Pace, I have a Henry M. born abt 1861 to a William Pace and Martha Etheridge. Henry married Mary Isaacs in 1880.
I believe one line continued to spell their surnames Isaacks while others dropped the K. If I'm remembering correctly the Isaacks were mostly in Texas while the others lived mostly in KY.
Can anyone untangle this puzzle?
I have a Mahala Lakes who married an Andrew Jackson Isaacs but she died before 1841 and he remarried.