I'm not local so I can't help you with local knowledge, I did search on the subscription site Roots Ireland and located some of the baptismal records for the children, The records were in Johnstown RC parish.
James 1846 Patrick 1848 Timothy 1850 Mary 1855 Timothy 1858 William 1861 (likely the 1850 Timothy died young). Here is the link to the parish register. You may want to look for the record for Judith. Possibly the older two children Ellen and Michael were baptized in another parish which does not have records available.