1
וישאר אך נח אין מיעוט אחר מיעוט אלא לרבות לומר שאף עוג נשאר: וישאר אך נח "Only Noah was left", all were limited and limited except those that were not included in that, all others that breath were run over (by flood).
2
אך נח בגימטריא עוג: אך נח Only Noach in Gematria עוג to draw.