Nadia,
Boyd’s marriage to Elizabeth was registered on 27.6.1933 in Belfast. You can view the original certificate on-line on the GRONI website, using the “search registrations” option:
https://geni.nidirect.gov.uk
You will need to open an account and buy some credits. It costs £2.50 (sterling) to a view a certificate.
Boyd’s birth in 1908. Mother’s maiden name Gilles:
https://civilrecords.irishgenealogy.ie/churchrecords/images/birth_retur…
Thomas & Mary’s marriage in 1899:
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1899/10385/5781524.pdf
Couple in 1901 census:
http://www.census.nationalarchives.ie/pages/1901/Antrim/Duncairn_Ward__Belfast/Glasgow_Street/932562/
This looks to be Mary’s birth in Co Cavan:
https://civilrecords.irishgenealogy.ie/churchrecords/images/birth_retur…
There are several trees on Ancestry that have this family. Mary’s parents were John Butler 1846 – 1893. No dates for Mary Cassidy. The couple had around 10 children. I can’t see a marriage for them, so don’t know when that took place except that it was probably pre 1868.
Thomas Hawkins parents were James Hawkins & Jane Johnston. Here’s their marriage in 1864:
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1864/11624/8279873.pdf
It would be easy enough to find all their children on the GRONI site as it searches on mother’s maiden name. They appear to have had 7, 4 of whom were alive in 1911.
James & Jane in 1901:
http://www.census.nationalarchives.ie/pages/1901/Antrim/Templecorran/Re…
And 1911:
http://www.census.nationalarchives.ie/pages/1911/Antrim/Templecorran/Redhall/188837/
You would need to search church records in PRONI to get back much further.
I spotted this birth of a Boyd Hawkins Kennedy. The mother was Sarah Kennedy. I’d take a guess that she was Thomas Hawkins sister, or certainly related to him:
https://civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1902/01926/1745949.pdf