If a player’s commander is a meld card and it’s melded with the other member of its meld pair, the resulting melded permanent is that player’s commander.
January 25, 2019 · Ravnica Allegiance
If a player's commander is a meld card and it's melded with the other member of its meld pair, the resulting melded permanent is that player's commander.
July 22, 2016 · Eldritch Moon
If a player’s commander is a meld card and it’s melded with the other member of its meld pair, the resulting melded permanent is that player’s commander.