For the purposes of deck construction and format legality, cards with interchangeable names have the same name.
July 23, 2021 · Adventures in the Forgotten Realms
If a player wants to choose the name of a split card, the player must choose the name of one of its halves, but not both. (See rule 709.) If a player is instructed to choose a card name with certain characteristics, use only that half’s characteristics to determine if this name can be chosen.
May 3, 2019 · War of the Spark
If a player wants to choose the name of a split card, the player must choose the name of one of its halves, but not both. (See rule 708.) If a player is instructed to choose a card name with certain characteristics, use only that half’s characteristics to determine if this name can be chosen.
January 25, 2019 · Ravnica Allegiance
If a player wants to choose the name of a split card, the player must choose the name of one of its halves, but not both. (See rule 708.) If a player is instructed to choose a card name with certain characteristics, use only that half's characteristics to determine if this name can be chosen.
January 19, 2018 · Rivals of Ixalan
If a player wants to choose the name of a split card, the player must choose the name of one of its halves, but not both. (See rule 708.) If a player is instructed to choose a card name with certain characteristics, use only that half’s characteristics to determine if this name can be chosen.
April 28, 2017 · Amonkhet
If a player wants to choose the name of a split card, the player must choose the name of one of its halves, but not both. (See rule 708.) If a player is instructed to choose a card name with certain characteristics, use the only that half’s characteristics to determine if this name can be chosen.
July 22, 2016 · Eldritch Moon
If a player wants to name a flip card’s alternative name, the player may do so. (See rule 709.)