Irene;
My Great great grandparents,Michael and Anne were both from Westmeath.
You may have luck finding your Ann in England with freedmb or rootschat.com.
When i started researching my family almost 4 years ago,I had no idea that given names were used repeatedly by brothers naming their children after brothers,sisters parents aunts uncles ect!
Have you found their marriage license yet?any birth records for their children?
Good Luck!
Jim