Re Pool-1555 and Pool-1664
Which of these is the son of John and Muhulda Pool (see Pool-1131)
Since "Hulda" / "Muhulda" are such unusual names, most researchers, including me, seem to have gone with the Isaac Mitchell Pool who married Mary Gillbert and seemingly named a daughter after his mother (and the current profile Pool-1664 is slanted that way).
Most consider the parents of the "Texas" Isaac M Pool to be "uncertain" or "unknown".
However, the usually very careful DAR write up goes with the Isaac M Pool (sometimes referred to as "Texas" to indicate he is the one that migrated to Texas) who married Mary Smith. see Pool-1555.
I am not positive that the "M" for this second Isaac Pool stands for Mitchell (the son of John and Muhulda Pool is well documented to be Isaac Mitchell Pool).
There are multiple well documented Pool - Mitchell connections- so it is possible that there were two related SC Isaac Mitchell Pool men living in nearby counties.
If it were not for the DAR, I would have felt fairly confident in my choice.