 The date of first construction of a church in Llangaffo ( a village in Anglesey about 5 miles ( 8 @.@ 0 km ) south of the county town of Llangefni ) is uncertain . The village takes its name from the church : the Welsh word llan originally meant " enclosure " and then " church " , and " -gaffo " is a modified form of the saint 's name . St Caffo , a 6th @-@ century Christian , was a companion of St Cybi and was martyred by shepherds in the vicinity of what is now Llangaffo , perhaps in revenge for his brother Gildas insulting Maelgwn Gwynedd , the local ruler . It is thought that there may have at one point been a monastery in this location , known as " Merthyr Caffo " : merthyr is the Welsh word for " martyr " , and in place names means a building erected near a saint 's grave . 
 The date of first construction of a church in Llangaffo ( a village in Anglesey about 5 miles ( 8 @.@ 0 km ) south of the county town of Llangefni ) <a href='drop_aux' title='1'><mark>is</mark></a>uncertain . The village <a href='uninflect' title='2'><mark>takes</mark></a> its name from the church : the Welsh word llan originally meant " enclosure " and then " church " , and " -gaffo " <a href='drop_aux' title='3'><mark>is</mark></a>a modified form of the saint <a href='null_genetive' title='4'><mark>'s</mark></a>name . St Caffo , a 6th @-@ century Christian , was a companion of St Cybi and was martyred by shepherds in the vicinity of what is now Llangaffo , perhaps in revenge for his brother Gildas insulting Maelgwn Gwynedd , the local ruler . It is thought that <a href='dey_it' title='5'><mark>there</mark></a> may have at one point been a monastery in this location , known as " Merthyr Caffo " : merthyr is the Welsh word for " martyr " , and in place names <a href='uninflect' title='6'><mark>means</mark></a> a building erected near a saint <a href='null_genetive' title='7'><mark>'s</mark></a>grave . 
The date of first construction of a church in Llangaffo ( a village in Anglesey abt 5 miles ( 8 @.@ 0 km ) south of the county town of Llangefni ) uncertain . The village take its name from the church : the Welsh word llan originally meant " enclosure " and then " church " , and " -gaffo " a modified form of the saint  name . St Caffo , a 6th @-@ century Christian , was a companion of St Cybi and was martyred by shepherds in da vicinity of what is now Llangaffo , perhaps in revenge fir his brother Gildas insulting Maelgwn Gwynedd , the local ruler . It is thought that it may have at one point been a monastery in dis location , known as " Merthyr Caffo " : merthyr is the Welsh word for " martyr " , and in place names mean a building erected near a saint  grave .