Judy:
Welcome to Ireland Reaching Out!
I searched the subscription site Roots Ireland and did not find a marriage in Co. Limerick for a Michael Bourke/Burke and spouse with the surname Bremen/Brennan. I also could not find a baptismal record for Catherine anywhere in Limerick with the parents names provided. The Pallasgrean/Templebredin RC records go back to 1811 and Roots has 42 Bourke/Burke baptismal records with a father Michael over half of the records are in the 1830s/1840s, however, no mother named Johannah or surname Bremen/Brennan.
The 1850 Griffiths Valuation head of household listing for Grean civil parish shows a number of Burke records including a Michael in Garranemore townland.
https://www.failteromhat.com/griffiths/limerick/grean.htm
Are you aware of any siblings to Catherine?
You may want to add Catherine's story to our XO Chronicles site. Possibly someone will see a connection. https://www.irelandxo.com/ireland-xo/history-and-genealogy/ancestor-dat…
Have you considered DNA testing?
Roger McDonnell
