Im not researching either of your surnames,Im afraid,but I have noticed the surname Hyndman cropping up from time to time in the Stewarton,Ayrshire line Im presuming.I noticed this as its not a common name in Ayrshire & I do know someone of that Surname. I was looking at the Stewarton old parish records,not recent entries,probably 1700s
Chhers,
Mary