Variants on the names include Phenis, Fenis, Phoenis, Dofines. But all the family is baptized/married with it, Dauphiné being a dit name on some records. I would surmise that the original spelling is actually Phoenix, but given the level of mispelling extant at the time, anything that remotely sounds similar will have been used. I found the baptism of the son Joseph in Drouin, born and baptized 19 July 1727 in Repentigny. There is no trace of 'Gruffat' anywhere, I would remove it from where it is and put it in bio as a question mark.