Can someone advise me on how to find out how many children my GG Grandparents had ?
They were Bernard McGeown and Mary Thompson married 14 Oct 1893 at Belfast Roman Catholic Church, Belfast urban 6 parish.
I know they were living at 66 Anderson St between 1901 and 1906 as Bernard is shown as head of house on the 'A street' index and my Great Grandfather Anthony was born in June 1906, they possibly lived there a lot longer or at least within the area.
I know there was other siblings but i have no names, family story tell of a brother Arthur who lost his arm at Dunkirk.
There doesn't appear to be any online index for Ireland and the census is also not available online, is there some other way to find my Great grandfathers siblings

I would appreciate any suggestions, Thank you
Debbie