Notes from Xavier: “Laurent and his wife have many children in Ploumilliau between 1644 and 1663 (last one on October 2 1663).
I have not found the death of Laurent but did not go through all the record.
Some pretend he died in 1671 in a distant village. I did find a record but why would he have died so far away from Ploumilliau. There is no indication that it concerns your Laurent. He could be an homonym.”

Death certificate:

Marie Le Guerson aged 85 died in the communion of the Holy Church on March 8 1701 and she was buried the next day in the church of this parish of Ploumiliau and were present among others Jean Le Guerson her brother and Yvon Le Bonhom who do not sign