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I Scotland's people to find what became of Archibald mcdiarmid b1870 aryshire and his family

In 1901 he was a nailmaker in cumbuslang aged 31

With wife Sarah nee Andrews age30

Children George b1891,Sarah b1892,Mary 1894 Elizabeth 1896 and Andrew 1901

I couldn't find them in 1911

Elizabeth was a baker's saleswoman when she married july 1920 age given as 24 her father Archibald.s occupation is still nailmaker and on 1930 valuation rolls he is listed at Dean's avenue cumbuslang

Her husband Andrew macdermid is on same street until his death the informant is listed as an intimate friend of Borge crescent
Could this John McDiarmid of Borge crescent in1930 valuation rolls be a younger brother of Elizabeth or connected to Archibald ? And where were the other siblings between 1901 and 1960 ??

I didn't find their names in deaths or marriages with this spelling .
Any help from fresh pair of eyes will be appreciated.

the MacDermid.s are a separate family though I can't find Elizabeth under that spelling either in1920 her fiance Andrew macdermid was living at river road carmyle

EDIT There may be other connections to the MACDERMID family
as an Archibald + James McDermid(various spellings) were living in Belfast around the time Elisabeths's brother in lawDuncan fathered a child + sent his girlfriend to give birth there before living as a married couple in Denistoun Glasgow

That MACDERMID family's history is on
http://www.genesreunited.co.uk/boards/board/ancestors/thread/1313595?d=asc