My name is Nate Parrish in Mountain Home Arkansas and I am researching Johnsons of Montgomery and surrounding counties in Texas.
You say that your daughter's mother-in-law was a Johnson who married a Welch. These names rhyme with a Johnson in my family who also married a Welch.
I speak of Alma Johnson (1920-2001) married Homer Dell Welch (1917-2002). They are both buried in the Splendora Cemetery. Would this be the Johnson-Welch line that your daughter was married into?
If so I would love to discuss this in more detail with you as I am trying to locate info on a sister of Alma Johnson-Welch (Beatrice Johnson, who may have married a Roberts).
Hope to hear from you soon.