Bryan was born at Mt Shannon, Galway, Ireland.
He married Margaret McNamara (born at Athlone, Ireland in 1854) at Dublin, Ireland in 1878.
They had five daughters & one son. The son, Bernard, served in WW1.
Bryan was in Levin by 1896 as a platelayer. He continued in that job until becoming a farmer in Cambridge St Levin in 1928.
Bryan & Margaret, between them, owned a large number of lots of railway land along Cambridge St Levin from 1903 until at least 1925.
His surname was sometimes spelled as Dinan.