Luiss Serif by Antonio Pace
Luiss Serif includes 4 styles (2 weights: Regular, Bold, plus matching italics). Contains full set of glyphs, including uppercase and lowercase letters, numbers, symbols, stylistic sets, ligatures, etc. It features extended language support and it’s completely free for both personal and commercial use.
It’s the perfect serif companion for Luiss Sans.
SIL Open Font License → Licenses explained