Is this your Thomas?
1871 4896 /23/ 39
Linthorpe
Thomas Lahaney, 32 yrs , labourer, b Ireland
Mary , 28 yrs b Ireland
And several children.
The mother’s maiden name is recorded as variations of McMurray./McMorrow etc
Marriage September 1861, Hartlepool
Thomas Lahaney and Mary McMarraw
Do you have this marriage certificate with details of his father?