Henry I Comte de Treguier de PENTHIEVRE
Henry I Comte de Treguier was born in 1110.¹   He died at the age of 80 in 1190.¹ 

 Mathide de VENDOME
Mathide was born in 1132.¹ 

 Conan de la ROCHE DERRIRN
Conan de la ROCHE was born about 1150.¹ 

 Nobilis de TREGUIER
Nobilis was born in 1151.¹   She died at the age of 57 in 1208.¹ 

 Alain Comte de Gruingamp de TREGUIER
Alain Comte de Gruingamp was born in 1154.¹   He died at the age of 59 in 1213.¹ 

 Alix I de PENTHIEVRE
Alix I was born about 1170.¹ 

 Geslin Signeur de Coetmen de GOELLO
Geslin Signeur de Coetmen was born in 1180.¹   He died at the age of 51 in 1231.¹