Hi Jill,
My Robert's parents were Robert Plenderleith and Isabel Monroe. Robert was born 1809 St. Cuthberts.
However, I think the connection may be further back as I believe Robert senior's parents were Robert Plenderleith and Margaret Marr who had a son, Alexander christened 19.4.1778 in Liberton. Robert snr was born 11.4.1790 Liberton.
I haven't gone any further back with these as it's so difficult to be absolutely certain when there are no statutory certs. to confirm parentage.
If I come across any info. on Alexander I'll let you know.
Regards,
Alison