Westenholz or Westenholtz, Carl August Friedrich, was a German tenor, conductor, and composer. He entered the choir of the Mecklenburg-Schwerin Hofkapelle in 1749, where he studied voice with A. C. Kunzen and cello with F. X. Woschitka. In 1753 he was made Kammersänger to the court. When the Hofkapelle moved to Ludwigslust in 1767, he was appointed its Konzertmeister and director. From 1770 until his death he was its Kapellmeister, where he raised standards to a high level.