For Eliza(beth) Lawlor B 1850 +/- 5 yrs, Co. Laois, with a father forenamed D(enis), I found 2 rcds. Details and parishes are below:
Church Baptism Lalor Eliza 1846, Ballinakill Church Baptism Lalor Eliza 1848, Portarlington
For Marg(aret) Lawlor B 1850 +/- 6 yrs, ditto, I found 3 rcds. Ditto:
Church Baptism Lalor Margret 1849, Ballinakill Church Baptism Lalor Margaret 1850, Portarlington Church Baptism Lalor Margaret 1856, Abbeyleix
For Chr(istopher) Lalor B 1845 +/- 2 yrs, ditto, I found 1 rcd, 1845, Portarlington RC parish.
For Denis Lawlor M 1841 +/- 4 yrs, Co. Laois, I found 7 rcds. Details and parishes are below:
Church Marriage Lalor Denis 1837, Raheen Church Marriage Lalor Dennis 1838, Ballinakill Church Marriage Lalor Denis 1840, Abbeyleix Church Marriage Lalor Dennis 1843, Ballyfin Church Marriage Lalor Dennis 1843, Ballyfin Church Marriage Lalor Dennis 1843, Ballyfin Church Marriage Lalor Dennis 1843, Portarlington
For E??? Byrd M ditto, I found an Eliza, 1843, Portarlington. This MAY be a match to the corresponding rcd for Denis.
For John Mullin B 1848 +/- 5 yrs, Co. Roscommon, with the father's forename unknown, I found 6 rcds. Details parishes and father's forenames are below:
Baptism Mullin John 1843, Castlerea, Patrick Baptism Mullen John 1844, Athleague, Luke Baptism Mullen John 1848, Ardcarne/Cootehill, Patrick Baptism Mullen John 1851, Ballintubber/Ballymoe, Michael Baptism Mullen John 1852, Ballintubber/Ballymoe, Martin Baptism Mullin John 1853, Rosscommon, Patrick
Some of these MAY be for your ancestors. Will leave it to you to determine which, if any, rcds are.