Ernst Grenzebach (14 February 1871 – 29 May 1936) was a German concert baritone and voice teacher.
He taught, among others, two of the most famous European heroic tenors: Max Lorenz and Lauritz Melchior.
He also studied with the legendary baritone and teacher Cotogni, according to Shirlee Emmons in her Melchior biography TRISTANISSIMO (1990).
He was the principal teacher of opera and concert singing at the Klindworth-Scharwenka-Konservatorium, which for decades enjoyed the reputation of an internationally renowned training institution.
[2] The later record producer, manager and composer Herbert Grenzebach [de] (1897–1992) was his nephew[3] whose musical education was supported by his uncle.