Origin and designer unknown. Shown as Fat Cat by Lettergraphics in a 1974 ad (but not yet in their 1969 catalog) and by Conway in a 1974 poster, and as Frenzy by Typeshop (ca. late 1970s, but not yet in 1973). Also offered as Fat Cat by Solotype.

Digital interpretations include Frenchy (Red Rooster, “re-tooled from the QBF Collection”), Frenzy (SoftMaker, 2019), Katzenfatzen NF and Mogzilla NF (both by Nick Curtis), and Fat Cat DXS (Dick Pape), among others.