Ter Stegen, 34, joined Ajax from Barcelona on Tuesday, signing for one season after spending the second half of last season at Girona.
The 44-time German international was announced as Marc-André ter Stegen, the name he's gone by throughout his career. After his announcement, though, he was presented as Marc ter Stegen.
Dutch outlets confirmed that Ter Stegen had changed his name to Marc ter Stegen after an interview with the German goalkeeper, meaning he'd officially dropped André from his name.
In addition to Ter Stegen, Ajax manager Michel, whose full name is Miguel Ángel Sánchez Muñoz, said he will go by Míchel Sánchez from now on, as per the Spanish manager's own wishes.