Lambert II von Gleichen-Tonna

Lambert II, also numbered III, von Gleichen-Tonna (died 14 September 1227) was a Saxon count and, from 1193, archiepiscopal Vogt of Erfurt and its Peterskloster. He married Sophie of Weimar-Orlamünde.

His sons Ernst IV and Heinrich I founded the two comital lines of Gleichen and Gleichenstein, while another son, Hermann, became bishop of Cammin. Lambert's grave slab, which later became linked to the legend of the count with two wives, survives in Erfurt Cathedral.