Hi Catherine
I do not know anything much at all about the Broe line.
What I have was in research that a cousin did a few years back, with the help of some professional researchers. However, I have only been able to locate a very small part of her research and sadly she passed awy before I started this lark, so I cannot ask her any of the dozens of questions I have.
As far as I have been able to make out, John Broe & Elizabeth Brown had at least 2 sons....Thomas b. Dec 1824 in Dublin Co (possibly at Rathfarnham), and possibly Patrick Matthew b.1823.
Thomas was a labourer when he enrolled with the 65th Regiment of Foot in 1842 and was posted to NZ, arriving in Aug 1846. Once in NZ the name seemed to become Brough.
Thomas had a son, John Maitland Brough born aboard the ship coming out, who married into my Wallace line.
That is about all I know.
Sorry that I can't be of more help.
Blessings
Lyn