I saw that Maureen updated this thread and I also have an update on my Crawford line, which makes clearer some potential links.
My Grandmother Letitia Patton Crawford was born 28 Jul 1880 in Newtownards (resitor), Down.
Her father was William Crawford, born 1849 in Newtownards, County Down. Married to Jane Brown.
Letitia had a number of siblings, most also born Newtownards.
The family were recorderd on 1871 Scottish Census in Glasgow, with William (aged: 22) named as a Hammerman (usually a metal worker or smith).
Hopefully ths may ring a few bells, at some point!
Regards; Phil