Dear old great grandmother born in Castlereagh, Roscommon

I have found that my great grandmother listed Castlereagh, Roscommon, Ireland as her place of birth on her marriage record in 1902 in Jersey City, New Jersey, USA.  Her parents were listed as John Kelly and Catherine Connaughton (maiden name). 

My grandmother's name was Catherine Kelly, born 10 November 1885.  She immigrated to the USA in 1902.  Her desitnation was listed as brother in law in Port Richmond, Staten Island, New York.  However, I do not actually find her until the 1910 census in Jersey City, NJ.  By that time she had a five year old daughter named Catherine but was newly married to a man Eddie Nixon.  Eddie is NOT the father of her 5 year old daughter Catherine as she is listed as his step-daughter.

I would dearly love to find out more about my dear ol Irish great grandmother.  She passed away when I was only a few months old in 1953 so I never got to know her or have any pictures of her.  A sad thing to me.