Bryan in ulster they have records eg
1. 1660s see
http://www.billmacafee.com 17thC Census substitutes the last spelling is deemed the contemporary spelling
Tyrone Dungannon Upper Desertcreat Derrygortanea Dirregortnea James Brian Bryan
Antrim Cary Ballintoy Templasteragh Templasteragh Wm Brian Bryan
Antrim Belfast Upper Shankill Town of Belfast Parish of Belfast Wm Brian Bryan
Antrim Antrim Upper Ballycor Ballyboley Ballyboly John McBrean McBrean
Antrim MassereeneUpperBlarisLisburnLisbourneBrian McBrinn McBreen McBrian
Tyrone Omagh West Longfield Kilmore Killmure Torlogh m'Brian McBrian
Tyrone Omagh West Longfield Dooish Dowis Torlogh m'Brian McBrian
Tyrone Omagh West Termonamongan Altamullan Altemullan Dualtagh m'Brien McBrian
Tyrone Strabane Upper Cappagh Gortnacreagh Gortnatree Donachy m'Brian McBrian
Tyrone Strabane Lower Ardstraw Envagh Envah Rory oge m'Brian McBrian
Tyrone Strabane Lower Ardstraw Tamnagh Tavnagh Torlogh m'Brian McBrian
Tyrone Strabane Lower Ardstraw Letterbin Litterbine Owen m'Brian McBrian
Tyrone Strabane Lower Ardstraw Drumlegagh Drumlogah Art m'Brian McBrian
Tyrone Strabane Lower Ardstraw Rousky Rusky Tool m'Brian McBrian
Tyrone Strabane Lower Ardstraw Derrygoon Deriwoon James m'Brian McBrian
No O’Bryan found
2. 1824-1837 The Tithe Applotment Books for the 26 counties are indexed and on line in quantity the breakdown is 1717 Bryan, 57 Bryans, 37 McBryan, 15 O’Bryan etc However finding the ones located in the Northern Ireland is a nightmare, thankfully the irishgenealogyhub do an attempt, they are on line by county then by parish so Co Antrim , Aghagallon civil parish is
http://www.irishgenealogyhub.com/antrim/tithe-applotments/aghagallon-parish.php#.V27Z0leoc5Q3. Griffiths Valuation Using the quick index
http://www.failteromhat.com/griffiths.php you can search by Name and Province, so if you wanted the Ulster then a list is produced sometimes including spelling variants, the 122 quantity modest compared to the other provinces
21 Antrim Bryan, Bryans+ 1 O'Bryan
12 Armagh Bryan, Bryans
2 Cavan Bryan, McBryan
5 Derry Bryan, McBryan+ a variant Abryans
4 Donegal Bryan, McBryan
6 Down Bryan, Bryans, O'Bryan
50 Fermanagh Bryan, Bryans, McBryans
23 Monaghan Bryan, Bryans
9 Tyrone Bryan, Bryans, O'Bryan
Good luck in your searches