Samuel Patterson

[Sinann]

1911
http://www.census.nationalarchives.ie/pages/1911/Down/Ormeau/Jocelyn_Street/214656/

Are you sure the Sarah living in number 47 isn't Samuel Todd's older sister?

[idr6]

Thank you for this. It provides the earliest address that I have for Samuel Patterson and Lizzie (Thompson).

[idr6]

The Sarah living at 47 St Kilda Street is definitely not Samuel's elder sister. That lady never married and is buried in the family plot in Belfast City Cemetery (Plot. G1 488). 'My' branch of the Pattersons moved into St Kilda Street about the time that part of it was built in 1900 at number 49, and later married girls (Sarah Longridge and Ellen Rowney) occupied other houses in hte street at different times.

[idr6]

Thank you.

[Sinann]

That Sarah married Thomas Longridge
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1906/10112/5679259.pdf
1911
http://www.census.nationalarchives.ie/pages/1911/Down/Ormeau/Saint_Kilda_Street/217654/

There is no obvious connection between the older Samuel and Elias, it could be further back but you would need to trace to the earlier generation.
It may simply be a case of two unrelated families have the same surname and ending up in the same street.