On the marriage for Rebecca the residence is Corbawn, which is a spelling variation of Corbane, and on the marriage for Mary Eleanor the residence is Corr, which could refer to Corbane or to the combined townland of 'Cor Beg and Cor More', which is adjacent to Corbane townland. According to the placename database the Cor/Corr in the names means "round hill, pointed hill, hollow; pointed, conspicuous, odd", Bán is the Irish for White, 'Beg' and 'More' are Irish for small & big. See the townlands on the c1840 OSI map.
Both Corbane and 'Cor Beg and Cor More' are in Lemanaghan civil and church of Ireland parish which would fit with the bride's residence.
Griffith's Primary Valuation shows a John Whitfield leasing a house, offices and land of over 100 acres in Corbane townland in 1854 - maybe a brother or uncle to Rebecca & Mary Eleanor ?
The 1901 census includes a Whitfield household at Corbane townland, although they are Catholic..