You could try the school. They have some very old records there. Also, people born in Brownstown may also be from the Curragh - closer geographically or from Kildare town.
Good luck in finding information. Actually - there is still Nouds from around there living there at the moment. One of them is Fr. Dan Noud who went to Africa as a missioner. He frequently comes back to the parish on fundraising visits. Lovely man.