Rule 201.3 · Name
Some cards with different English names are treated as though they had the same English name. Pairs of cards with this property have names that are interchangeable.
Subrules
For the purposes of all rules, abilities, and effects that refer to a card’s name, objects with interchangeable names have the same name. (See rules 201.2a–b.)
For the purposes of deck construction and format legality, cards with interchangeable names have the same name.