Lineage. Kerberos belongs to the Kis–Janson line. This Dutch-baroque genre is a cornerstone of book typography. Miklós Tótfalusi Kis cut the first types in Amsterdam around 1685, and they were sold for centuries as Janson. The type is compact, sturdy and economical on the page, a face for setting books.
Features. From the Kis–Janson tradition come the drooping ball ear of the g, the gently curved bars of A and B, the straight angled leg of R, the even colour on the page, and the contrasted Bold. Weight runs from Light 300 to Bold 700, and the italic is a separate, narrower hand. Optical size runs from 8 to 72 point and follows the text size: small text is wider, larger on the body and lower in contrast, and below 20 point its x-height and default grade grow too; display sizes are tighter, with finer hairlines. Grade, from −50 to +100, changes the contrast of the thin strokes without moving a single line; at −50 the hairlines have Dutch-baroque contrast. Lowercase height, from 500 to 550, makes the x-height up to a tenth taller, small caps and oldstyle figures with it, keeping every letter's width. Small caps, the full set of f-ligatures (fi, fl, ff, ffi, ffl, fj, fb, fh, fk, ft) and Latin, Greek and Cyrillic support complete the family.
Figures. Oldstyle figures are the default, so a date like 14 March 1879 sits within the lowercase. Lining figures are there for tables and headings: 1,250 COPIES IN 2026.
Heritage. Kerberos is drawn on Alegreya by Juan Pablo del Peral (Huerta Tipográfica) and Crimson Pro by Jacques Le Bailly and Sebastian Kosch, and released under the SIL Open Font License. Every earlier member of the line is commercial.