Julia McDonagh born Dublin c1811

[BoslemBoy]

I've been searching for the marriage of Julia McDonagh/McDonough in Liverpool in the 1830s, without luck.  Her husband was Peter Hughes (born in Liverpool 1813), and their first child was born in Liverpool in 1835.  There must be a possibility that the couple travelled back to Dublin in the early 1830s so that she could marry from home.

Julia's age varies little from census to census: 40 (1851) / 45 (1861) / 60 (1871) / 70 (1881).  However her age at death looks to have been recorded as 78 (1885).  Thus her year of birth was probably 1811, but could have been earlier.  Given her husband's year of birth, 1811 seems reasonable.

Can anyone shed any light on her origins and a possible marriage?