Welcome to the site
There may be a link somewhere but not a close direct one
My Lawless is not a direct ancestor but the first wife of one; she was from the Rathfarnham/Roundtown (Terenure) area of Dublin
My Reilly is also an Ann and a direct ancestor and I have not much on her, she married in Dublin in a CoI parish but was obviously a catholic, so no leads in the church, and her father was James!!! I have recently through the help of another rootschatter, Tara, (and the prison records!) located her sister, Eliza, and I am hoping to find their parents and more information about this family through her.
If you are interested in following up on these families you can start a topic of you own with the information you have; this could be in the general area or Leitrim or Meath and see what we can do for you here. If Thomas and Ann married in 1849 their births will be before Irish Civil Records and you will be relying on Church/Parish/Other records for information which means the more you have to start with the better.