Your original post stated.
I’m hoping for help in finding the wife of my 7x great grandfather William Renwick, who was born on March 4, 1719 in Temple, Midlothian, Scotland. His parents were James Renwick
Your earlier post, which I agree with stated.
I redid the math for the marriage of William Renwick 1719 and Agnes Knox. Yes, she might be the wife, and William would have been 18 years old when they married.
You also posted
William Renwick 1719 had one son I know of was William Renwick, born May 11, 1744 in Kirkton, Roxburgh, and his wife was Janet Glendinning.
So the question is how did you conclude the 1744 William was correct and how did you know his wife was Janet Glendinning..
Colin