These are all children of William Doran and Honor Byrne listed in the I.G.I.
Crookstown is in the Registration District of Fontstown so Mary might well be a younger sister of Patrick, the next two are probably the same family and there might well have been a reason why the last child was registered in Wicklow as Crookstown is right next to the Wicklow border. As these births are from the civil registers there are none earlier than 1864.
1. MARY DORAN - International Genealogical Index
Gender: Female Birth: 28 FEB 1866 0459, Fontstown, Kildare, Ireland
2. JOHN DORAN - International Genealogical Index
Gender: Male Birth: 13 DEC 1867 , , Ireland
3. PETER DORAN - International Genealogical Index
Gender: Male Birth: 14 DEC 1869 , , Ireland
4. WILLIAM DORAN - International Genealogical Index
Gender: Male Birth: 06 DEC 1871 , Wicklow, Ireland
J.T.A.