All are mononuclear-macrophages except -

Macrophages take various forms (with various names) throughout the body (e.g., histiocytes, Kupffer cells, alveolar macrophages, microglia, and others), but all are pa of the mononuclear phagocyte system Reff: Ananthanarayan & Panikers textbook of microbiology 9th edition pg: 137