Hi Phil
Can't find the Toomey family on 1901 or 1911 censuses - am I missing something?
This might be death of father John:
Ireland, Civil Registration Deaths Index, 1864-1958
Name: John Toomey
Estimated Birth Year: abt 1865
Date of Registration: Jan-Feb-Mar 1904
Death Age: 39
Registration district: Dublin South
Death Country: Ireland
Volume: 2
Page: 667
FHL Film Number: 101602
This John Toomey is buried in Glasnevin Cemetery
http://www.glasnevintrust.ieHere's the marriage info for John Toomey (same for Margaret Carroll, so a probable match):
Ireland, Civil Registration Marriages Index, 1845-1958
Name: John Toomey
Date of Registration: Apr-May-Jun 1896
Registration district: Dublin South
Volume: 2
Page: 651
FHL Film Number: 101258
And here's the marriage for Margaret Toomey/Carroll to William Kavanagh in 1922:
Ireland, Civil Registration Marriages Index, 1845-1958
Name: Margaret Toomey
Date of Registration: Jul-Aug-Sep 1922
Registration district: Dublin North
Volume: 2
Page: 323
FHL Film Number: 101575
Happy hunting!
Colette