Griffiths Valuation shows an Owen Meehan in Coolfore Townland, Magheross Parish in 1861. Next farm is occupied by Catherine Ward...perhaps your Catherine was named after her?...possible. There is also an Owen Ward.
There are Owen Meehans also in:
Killylough, Tedavnet; Knockcor, Tedavnet; Drumgowna, Magheross; Coolreagh, Killanny; Donaghmoyne, Donaghmoyne. The Tedavnet ones are north of Monaghan town, the others are near to Carrickmacross which is only about 10 mi. from Carrickaduff.
The Tithe Applotments also show an Owen Meighan in Coolfore Townland in 1823, as is Bryan Meighan. Peter and Thomas Ward are also in the townland. The Catherine Ward of Griffiths was likely married to one of them.
Other Owen Meehan/Meighans in the Tithes:
Drumguil, Drumsnat; Drumquill, Clontibret;
1901 census for Coolfore shows Bernard Meehan, age 70, with family.
There was an Owen Meighan who died in Co. Monaghan in 1877 age 65. Also, an Owen Meehan who died in 1883 age 63.
Is this your family here?:
1881 Census England and Wales:
Name: Catherine Meighan
Age (Original): 13
Gender: Female
Birth Year: 1868
Birthplace: Ireland
Relationship to Head of Household: Daughter
Marital Status: Single
Occupation: Scholar
Address: 2 Gas St
Event Place: Ormesby, Yorkshire (North Riding), England
Disability:
Record Type: Household
GS Film number: 1342170
Affiliate Publication Number: RG11
Piece/Folio: 4861 / 135
Page Number: 33
Household Role Gender Age Birthplace
Owen Meighan Head M 56 Ireland
Mary Meighan Wife F 46 Ireland
Francis Meighan Son M 16 Ireland
James Meighan Son M 14 Ireland
Catherine Meighan Daughter F 13 Ireland
Bridget Meighan Daughter F 11 Ireland
Owen Meighan Son M 9 Ireland
William J Meighan Son M 7 West Hartlepool, Durham, England
Mary Meighan Daughter F 2 North Ormesby, Yorkshire, England