1901 census will soon be added to National Archives website along with 1911 that's there now. However, I have copies of 1901 Aghadowey census.
1901- Cullycapple- Charles Leek, Chuch of Ireland, 40, not married, born Co.Derry, carter; visitor John McLaughlin, Church of Ireland, 50, not married, born Co.Derry, farm labourer. (I think I've heard were Charles Leeke came to in Aghadowey but not sure if I wrote it down).
1901- Ballybritain- Hugh W.B. Thompson, Church of Ireland, 29, not married, Donegal, clerk in Holy Orders; servant Jane Brown, Presbyterian, 39, wid., Co.Derry, housekeeper-domestic servant. (I was mistaken about Jane using maiden name in 1901 but marriage to Leeke in civil index she is def. listed as Wilkinson).
William Wilkinson Brown's birth was registered July/Sept.1892 in Coleraine district. So father's death earlier the following year is quite possible.
Samuel James Brown's birth was registered July/Sept.1891 in Wexford district (not Wicklow)- as Samuel James Browne- and 1901 census says born Co, Wexford.
Think Sam's wife Rachel Doherty was the daughter of John Doherty and Ann Jane Wallace- they lived at Mullahinch and Cullycapple.
Yes, William married Elizabeth Florence Lawford 1921 in Albury district, New South Wales. Also found Jimmy Leeke's marriage in 1932 in NSW.
www.bdm.nsw.gov.au/familyHistory/searchHistoricalRecords.htmWill do some more digging over the next few days and let you know what else I can discover.