Is his first name Pierre, or Pierre-Michel?

Can anyone cite a source to validate his correct first name?

Pierre Morin dit Boucher

Dave, this is from PRDH, marriage of his SON:

marriage Couple no.
26213
Montmagny
1707-01-10
Rank Name Age M.S. Pr. Sex
01
PIERRE MORIN
SPOUSE OF 02
DECLARED NOT BEING ABLE TO SIGN
--- c p m
02
MARIE BOULE
SPOUSE OF 01
DECLARED NOT BEING ABLE TO SIGN
--- c p f
03
PIERRE MORIN
FATHER OF 01
--- --- p m
04
FRANCOISE CHIASSON
MOTHER OF 01
--- --- p f
05
JACQUES BOULE
FATHER OF 02
--- --- p m
06
FRANCOISE FOURNIER
MOTHER OF 02
--- --- p f
07
GOULVEN CALVARIN
Occupation : PRETRE, CURE
Residence : MONTMAGNY
--- c p m
© PRDH
www.genealogy.umontreal.c

So he is listed as just Pierre in this document. Will see if I can find his death. Can't find his birth in the PRDH

Dave, more from PRDH: no mention of Pierre-Michel:

Couple
# 5243 [Family]
of PIERRE MORIN
Burial : 1741-04-15 St-François-de-la-Rivière-du-Sud
Father : PIERRE MORIN
Mother : MARIE MARTIN
Couple
and FRANCOISE GIASSON
Father : GUYON DENIS GIASSON
Mother : JEANNE BERNARD
Couple
Marriage: 1682-11-08 Acadie