Margaret moreland

[jamestori]

Thank you very helpful

[gaffy]

Margaret Carment, according to these records from the FamilySearch "Scotland, Births and Baptisms, 1564-1950" database.

Daughter Mary: https://familysearch.org/ark:/61903/1:1:FQW4-Z3G   
Daughter Susannah: https://familysearch.org/ark:/61903/1:1:FQWH-9S8

Edited to add: Margaret Carment in this record from the FamilySearch "Ireland Births and Baptisms, 1620-1881" database for son George Patrick Boyle:

https://familysearch.org/ark:/61903/1:1:FP7W-JS8

Did George end up in New York?

https://familysearch.org/ark:/61903/1:1:2WD1-ZBW   

[gaffy]

Did George end up in New York?

https://familysearch.org/ark:/61903/1:1:2WD1-ZBW

There is a WW1 draft registration card for George Patrick Boyle, described as an Irish citizen, he was an orderly at St. Francis Hospital in the Bronx NY, critically his nearest relative was described as Margaret Boyle of 22 Cape Street Belfast, so that pretty well seals the deal on him being your Great Gran's brother.

[gaffy]

Not sure if you're interested in this, but from the Belfast street directories for Cape Street, courtesy of the lennonwylie website:

1918: 22. Boyle, Robt., brick layer
1924: 22 Boyle, Robt., bricklayer
1932: 22. Boyle, Robt., brick layer

Also, your Great Gran's sister Mary Boyle married a Thomas O'Hara in 1904, one of the witnesses was a Margaret Boyle.