Seeking info on THOMAS SHERLOCK and HANNORAH WHITE

Would appreciate any information I can obtain on THOMAS SHERLOCK b 1790 who married HANNORAH WHITE b abt 1800, both of Offaly County.  Do not know parish of either.  They had 7 children, all born in Ireland:  John, Thomas, Patrick, Edward, Mary, Hannorah, and Agnes.  In 1845 the 3 oldest boys, John, Thomas, and Patrick immigrated to the U.S.  In 1848, the remainder of the family, including,THOMAS and HANNORAH also immigrated.  Hannorah died at sea; thomas died 10 days later in New York.  Also, any additional information on their daughter ELIZABETH b 1821 would be helpful.  Their first child was born in 1817 (Mary) so marriage likely was before this date.

Thank you for any helop you can give me.

M John