Of course, you are quite right - don't know how I made that mistake, except that sometimes I confuse left and right, so east and west are rather the same! I should have said "from Llanllyfni in the west to Glyn Ceiriog in the east" of course!
I haven't yet got back as far as putting my Glyn Ceiriog ancestors in Wikitree, but as it is my mitochondrial DNA line, they are the female ancestors of Ann Roberts who married William Lloyd. Her parents were John Roberts (Ellis) [son of Robert Ellis so he variously used Roberts and Ellis as his surname] from Llandrillo and Jane Jones from Cynwyd Fechan. Jane's parents were Thomas Jones (1730-1777) of Cynwyd Fechan and Elizabeth Morris, who was probably born in Llansantffraid Glyn Ceiriog (as all her siblings were) (1736-1781). Elizabeth's parents were Morris Hughes (b 1687 Rhiwlas, Llansilin, d after 1765, Nantyr Uchaf, Llansantffraid Glyn Ceiriog) and Catherine Nathaniel (b 1700 Llanarmon DC). I also know names of parents and paternal grandparents of Catherine Nathaniel. Catherine had six younger siblings that I know of who tragically all died soon after birth. Are any of these names familiar to you?