Mistress

-http://fmg.ac/Projects/MedLands/SICILY.htm#Manfreddied1266B

King Manfredo had one illegitimate child by an unknown mistress:

• 7. BEATRICE. The primary source which confirms her parentage and marriage has not yet been identified. 1284. m RANIERI della Gherardesca Conte di Donoratico, son of --- (-1325).