50 McKeown in the Northern Ireland telephone book but none with Knockbreda in the address.
1911 Census has Marr's with double names like Mcmaster Marr, must be a family thing. Some born in Scotland and England as well as Belfast and Dublin.www.census.nationalarchives.ie
Annie McKeown, born Randalstown, Antrim living at
16 Knockbreda Road, (Ormeau, Down)
Didn't locate a tentmaker. I know there is a way to find professions.
Wasn't able to find all the family first names in one place in the 1911, most had wrong father's names.
Griffith Valuation 1860: used as census substitute
Knockbreda, is a Parish in the town of Belfast in the Poor
Law Union of Belfast or Lisburn
5 McMasters' in Knockbreda Parish (usually place of marriage is wife's Parish) the names are
William x 2
Note some of the spellings in Griffith for McKeown is
Ormeau is the Dedicated Electoral District it seems for
Knockbreda in the Census.
There are two sources of baptism and marriages for
(free to view)www.rootsireland.ie
a not for profit but pay to view