Final answer:
A catechumen is someone preparing for Baptism at Easter, a significant part of Christian ritual leading to this sacrament during the Easter Vigil.
Step-by-step explanation:
The name of a person who has been accepted to prepare for Baptism at Easter is a catechumen. The preparation period is part of the Christian ritual and tradition which includes various stages leading up to the sacrament of baptism. This period of preparation is most pronounced during the period of Lent, culminating in the Easter Vigil, where the catechumens receive baptism.