http://www.catholic-forum.com/saints/saintb03.htm

Another version, less scholarly at
http://www.irelandseye.com/irish/people/saints/brigid.shtm
See last graph re connection with word "brides" which I think may be a bit far-fetched. ??
Then there is the aspect of Brigid as a Celtic Goddess at :
http://druidry.org/obod/deities/brigid.html

And while I am on the subject of Patron Saints ----
I believe St. Catherine is patron saint of spinsters as in the poem I learned in grade school :
"Saint Catherine, Saint Catherine,
O lend me thine aid,
And grant that I may never die an Old Maid."
Blessisngs.
Your High Priestess, wow