The Mulvaneys and Bradys are my relatives, and the connection goes back several generations to Michael Mulvaney and Mary Gibney (b. 1870s). They lived at Whitegate Cross, Cavan and had a daughter, Mary (b. 1905), who married Patrick Brady.
The land later passed to Michael since the majority of his brothers had already left Ireland for the US (like my grandpa, who left in 1930), thus, the farm passed down through the Brady family.
If you need more information, please feel free to message me.