Civil Parish: Omey
Church Parish: Clifden
District Electoral Division: Sillerna
Area: 14.70 acres / 14 acres, 2 roods, 31 perches
1911 Census for Roeillaun (no records)
1901 Census for Roesillaun (no records)
Old Pension Census (1841-1851) for Roeillaun (no records)
The tenants of the townland of Rossadillisk leased 3 acres, 1 rood and 12 perches of land from The Rev. Sir Christopher R. Leighton Bart. For 15s.