« Reply #18 on: Saturday 18 April 20 19:20 BST (UK) »
Please don't read any significance into spelling. 'Correct' spelling is a relatively recent concept, dating from the end of the 19th century. Some clerks would write Cum, and others would write Crumm.
Oh but I do. In the days when a cash receipt from a shop had to record the name of the purchaser my mother would answer the enquiry as to her name with; "Mrs Crum".
Those who have, shall we say, uncommon surnames will know there are different reactions.
1) The very polite assistant/clerk who, using a BBC voice, will pronounce any vowel, Crimm, Cramm, Crom, but not a "u" as in "Crum"
2) Then there's the individual who thinks; I know what I heard but it can't be "Crum" so I'll scrawl an illegible surname
I do accept that during an age when not everyone had been given a bible from which it was expected they could learn to read, there were deviations - such as my Halliday Shearen family from Norfolk who travelled down to Cambridgeshire, where the strong dialect in 1851 translated the surname to Sharring.
Aberdeen: Findlay-Shirras,McCarthy: MidLothian: Mason,Telford,Darling,Cruikshanks,Bennett,Sime, Bell: Lanarks:Crum, Brown, MacKenzie,Cameron, Glen, Millar; Ross: Urray:Mackenzie: Moray: Findlay; Marshall/Marischell: Perthshire: Brown Ferguson: Wales: McCarthy, Thomas: England: Almond, Askin, Dodson, Well(es). Harrison, Maw, McCarthy, Munford, Pye, Shearing, Smith, Smythe, Speight, Strike, Wallis/Wallace, Ward, Wells;Germany: Flamme,Ehlers, Bielstein, Germer, Mohlm, Reupke