I had to smile reading this. Just about all of my many French and Acadian lines go back to the 1600s but throw in a few English, Irish or Scots and the brick walls appear. Ocremont-2 is a case in point. A pressing question is what Elizabeth's surname was. Ocremont, Oeremeant, Occro-man, Ocromen; O'Cromen, AKamane, Ackmann, DeRemeant, Riman, Bethsy O'Conner, Eckert, Wekerm, Foreman, are some spellings in the records found in Virginia and Louisiana. She married William Rowan-seems simple enough but here are spellings found in south Lousiana church records for Rowan: Rowan, Rowen, Roan, Rouane, Rohoue, Roane, Roinne, Romen, Boone, Roanne, Rohan, Riman, Rowean, Roen, Rouen, Royan, Bowan, Arwin, Ronene, Rouenne, Roccaine, Ronane, Rohanne, Roucine, Honore.
Without an plausible spelling, I can't find where they came from before immigrating to present-day USA.