As you can see from the page for George RUNCIMAN, blacksmith, of Kilsyth, Kirkintilloch, and Glasgow, newly added to the One Name Study lineage section, it rather looks like the solution proposed back in 2010 to Sandra's interesting family questions posted on the RUNCIMAN Mailing list back in 2006 looks even more likely.
George & Mary's family were a little hard to uncover, but eventually, combined efforts have winkled them out of hiding - raising more questions along the way of course.
Included in the search were two more entries for Inventive indexing - RUNCLEMORE, and KNUDMORE, from findmypast and ancestry indexing the same 1871 census entry - which I've not sighted, but the evidence says that this is Sandra's Andrew RUNCIMAN.