According to this article by someone who attended LeakyCon, Pottermore tells us that "Professor McGonagall’s father was a Presbyterian minister by the name of Reverend Robert McGonagall." Based on this, I suggest moving this article to "Robert McGonagall." -- Parodist 04:24, August 3, 2011 (UTC)
Moved and updated the article in accordance with this new information. ★ Starstuff(Owl me!) 19:18, August 3, 2011 (UTC)
