Notes from Xavier:

“He is indeed the son of Philippe (this is now confirmed by several other records).
His mother’s first name is Aliette or Adélise or Jeannette depending on the records.
Philippe and his wife have 2 children in Q-G in 1600 and 1602 and then one in Ploëzal in 1612.
The Baptism of Quintin cannot be found because of lacks in the record of Ploëzal after 1612.
 
Some say that Catherine Dumoulin was born in Etables-sur-Mer on April 20 1618 but I have so far no elements to insure that it is the one who married Guyon Quintin.
 
Guyon Quintin and Catherine Dumoulin have a daughter Catherine in 1642 so they got married before that year. If it is in Q-G. the wedding cannot be found because of the lack in the record. The record for weddings in Etables starts only in 1649.”

Death certificate:

Catherine Dumoulin died and was buried in the parochial church of Q-G. by me undersigned priest this day 14th of July 1654