Monahans Monaghans in Ballyglunin, County Galway

I am looking for information about the family of Martin and Catherine Monahan who lived in Ballyglunin County Galway as late of 1930s.  Catherine Monahan's daughter immigrated to the US and her granddaughter came for a visit sometimes before 1914. Her daugher and son in law also visited in 1900 from the US.  They were Roman Catholics.