Yes. Baptists today trace their origins most directly to a group of English reformers, particularly the “Puritans,” in the late 16th and early 17th centuries. In general these reformers were “protesting” what they saw as corruption and faithlessness in the long established “official” church of the time. These early Baptists were also influenced by the beliefs of the Mennonites and other “grass roots reform” movements on the European continent. The word “Protestant” thus generally describes the wide variety of new Christian churches and groups that emerged from this intense period of religious reform often called the “Protestant Reformation.” Most Baptist scholars and the majority of Baptists agree that Baptists are, in this historic sense, “Protestant.”
Some Baptists, however, maintain that a spirit of reform and faithful resistance to established church traditions had always been present in the Christian church. This spirit was seen even before the Protestant Reformation in such early reformers as the Waldensians and the Moravians, in the individual example of people like Balthazar Hubmaier in Germany, and in the intensely committed faith of groups like the Hutterites and the Brethren. In that sense, many Baptists maintain their origin is earlier than any one historic episode.
— Everett Goodwin