Anabaptists trace their roots to Huldreich Zwingli who formed the anabaptist movement AFTER breaking with Luther over the nature of the Eucharist. Empirical historical accounts and contemporary writings during the Reformation(not 20th century revisionism) bear this out.
Zwingli was not the founder of the Anabaptists. He broke with them over the issue of Anabaptist insistance ofn believer's baptism (rejection of infant baptism), the propriety of a Christian being a magistrate, etc. Zwingli's disciples, Grebel, Blaurock and Manz, after breaking with were martyred by the Protestants. Not a proud moment for the Reformed tradition yet quite in keeping with the intolerance of the era.
There were also Anabaptist beginings in response to Luther. The Zwickau prophets were joined by Andreas Carlstadt, Luther's colleague who thought the reform was not thorough enough. Luther summoned the German princes to put down these "radicals" by force.