The names Steven St. Aubin and Caroline St. Aubin from Manteno/St. George are my Grandparents. I spent several summers out in Manteno as a boy. Fregeau sounds like your from Aunt Marie and Uncle Oliver and posibaly a wife of their son or Grandson Leo Fregeau Sr. Or Jr.
My dad was the youngest of the children, 3 boys and 7 girls.