Finding Relatives in Limerick

My brother Michael and I are travellng to Ireland in mid September and would love to meet some of our relatives.  Our paternal great grandfather was Michael O'Regan and our paternal great grandmother was Mary Rochford.  They were married in  Kilrush on April 6, 1892.  At that time Michael was 25 years old and living on Burton Street.  Mary was 18 and lived in the Bow.  They had a son Patrick who was born February 15, 1895 when they lived on Grace Street in  Kilrush.  They also had a son John born 1894 and a son Michael  born 1896 in Kilrush. It appears they then moved to  Limerick and continued to build their family.  Our paternal grandfather Thomas O'Regan was born February 17, 1990 at Gorman's Lane in  Limerick and was baptized at St. Michael's church.  Thomas' siblings born in Limerick included Martin (born 1902 ), Joseph (born/died 1905), Mary Bridget (1906), and Esther (1911).  There may have been another brother William (born 1909). The 1911 Census identifies their home as 6 Flag Lane Limerick No. 8. in the 1911 Census but William and Joseph are not listed. If you have any information about relatives that are currently living in Limerick, please let me know.