Michael Collins and Mary Donovan married but record for the era not available.

In Tithe Applotment Books for Lissane (Lissawn) Lower we see Michael and Humphry Collins jointly hold 28 acres

Children baptised in Caharagh Parish on dates on Baptismal Register:

Denis Collins, born c 1825

Humphrey Collins, born Lissane Lower, baptised 31 Aug 1831.  Sponsors: John Casey, Catherine Collins

Catherine Collins, born Lissane.  baptised 15 May 1833.  Sponsors: Humphry Leary, Catherine Burke

Jerry Collins, born Lissane. baptised 4 Dec 1835.  Sponsors: Jerry Cokley, Mary Burke

Michael Collins, born Lower Lissane. baptised 2 July 1837.  Sponsors: Timy Donovan, Mary Young

Jone Collins, born Lissane. baptised 4 Aug 1840.  Sponsors: Andy Collins, Mary Mahony

In Griffith's Valuation of Ireland for Lissane Lower to read
   Humphrey Collins occupies Plot 7 totalling over 60 acres
   Michael Collins occupies Plot 8 totalling over 67 acres
   both with others share bog in Plot 5 containing 35 acres.