Brennan is a very common name in the parish of Curry, Co. Sligo, and there are a lot of Brennan families still living there. It is also an area where many people emigrated from to UK and USA and many of those were Brennans.
There are two theories on the meaning of the name "Curry".
Curry, it is said could be "the weir" as somebody suggests, and there is a weir on the river there. The other theory is that it is Curraigh meaning "marsh".
There are a number of other places in the area with "curry" as part of the name -
Tubbercurry - "the well in the marsh" and "Ballincurry"- " the town in the marsh".
One clue that might help is that it was traditional to keep the same first names in families so, if you find another Edward Brennan at a later period in the records, you may be finding the same Brennan family.
Although the name is spelled "Brennan" in the Curry area, it is still pronounced as "Brannon" coming from the Irish "O'Braonain".