Hi, ive just come across these posts, and as ive been to the archive today, researching a Robert Davies, my ggg grandfather i thought id share some info i gleaned.
The following info from the original parish registers
William Davies (Blacksmith) and Mary Davies had the following children
Register says 'mochtre' as the residence for all births
David B 12/11/1815
John B 5/7/1818
Jane B 11/5/1820
Robert B 5/10/1821
Jane B 22/2/1824
no further births before or after in the llandrillo yn rhos register, also couldnt find a marriage, so as you say above they were from elsewhere
my robert b 1821, had a daughter called grace who married a daniel lloyd, they lived at felin (mill) in mochdre in the late 1800's, had 11 kids!
My mother a desendent was born at werndale, mochdre in 1936