I live over in the US, and so I won't be at that Kildare meeting either. Any details about Laurence's parents or siblings are unknown to be, as most of my research involves Kate's family. If you go on the familysearch.org site and search under Naas it may help you get further information though. There's a record there for a Jane Cribbin b. 1806 d. 1896 that seems to be Jane Dunn, and a Laurence Cribbin b. 1809 d. 1889 that could have been her husband. Either RootsIreland or GRO Ireland should have the records available to review for a fee.
Also, thank you dancer for the information on Lena Cribbin.