presuming you have already searched the free website
https://www.irishgenealogy.ie/en/did the Codd or Coyne stay in Ireland say 1854 to be include in the homesteads listed in Griffiths valuation see in summary
https://www.failteromhat.com/post1845.phpCodd William Tonaphort Kilbeggan Westmeath
Codd John Ballynacarrigy Main St. Kilbixy Westmeath
Codd William Laragh Kilcumreragh Westmeath
Codd William Coola Kilbeggan Westmeath
Codd William Kilbeggan Market Square Kilbeggan Westmeath
Codd William Hallsfarm Kilbeggan Westmeath
Codd William Kilbeggan Kilbeggan Westmeath
Codd William Kilbeggan Lower Kilbeggan South Kilbeggan Westmeath
in Wexford too many to show
46 Coyne listed in Westmeath, NO COYNE or Coin LISTED IN WEXFORD[that is strange did they all emmigrate both ~1854
for detail see
http://www.askaboutireland.ie/griffith-valuation/index.xml?action=doNameSearch&Submit.x=26&Submit.y=11&Submit=Submit&familyname=coyne&firstname=First+Name&baronyname=&countyname=WESTMEATH&unionname=&parishname=have you seen the Codds and Coyness in 1823-37 which is an incomplete record not usegul for genealogy ties other than useful tracking down areas named people lived
start with
http://titheapplotmentbooks.nationalarchives.ie/search/tab/results.jsp?surname=codd&firstname=&county=Wexford&parish=&townland=&search=SearchCodd Loughnagore Kilbeggan Westmeath 1834
Codd Mill Holding Kilbeggan Kilbeggan Westmeath 1834
Codd Wm Ballinsudry Kilbeggan Westmeath 1834
Codd M Ballinsudry Kilbeggan Westmeath 1834
Codd Hallsfarm Kilbeggan Westmeath 1834
Codd Wm Townparks Kilbeggan Westmeath 1834
Codd Abraham Cappinrush Rahue Westmeath 1826
Codd Sara Ross Rahue Westmeath 1826
there are 117 Codd in Wexford eg five
Codd John Knottown Ardcavan Wexford 1833
Codd John Knottown Ardcavan Wexford 1833
Codd John Ballymurry Ballyhuskard Wexford 1834
Codd Jno Aghnafin Ballyhuskard Wexford 1834
Codd John Ballyregan Ballymore Wexford 1833
Coyle Chas Fincarn Foyran Westmeath 1828
Coyle Chas Finea Foyran Westmeath 1828
Coyle Chas Finea Foyran Westmeath 1828
Coyle Peter Finea Foyran Westmeath 1828
Coyle Chas Curnacreevy Foyran Westmeath 1828
Coyle Michl Curnacreevy Foyran Westmeath 1828
Coyle Patt Foyran Foyran Westmeath 1828
Coyle Michl Clonmellon Killua Westmeath 1830
Coyle Michl Clonmellon Killua Westmeath 1830
Coyle Michl Kilrush Killua Westmeath 1830
Coyle Thomas Fulmort Lackan Westmeath 1824
Coyle Hugh Lackin Lackan Westmeath 1824
Coyle Pat Kilmore Lickbla Westmeath 1827
Coyle Williamstown St Feighin's Westmeath 1829
Coyle Patrick Glassganey Ardcavan Wexford 1833
Coyle Patrick Glassganey Ardcavan Wexford 1833