granddaughter of King Daniel of Galicia received the surname of "der Reusse" (Ruthenus, a term for the Kievan Rus'), whence the name later passed to his country...

non-Polish nobility in the Commonwealth. Many referred to themselves as "gente Ruthenus, natione Polonus" (Ruthenian by blood, Polish by nationality) since the...

able to metamorphose on roach (Rutilus rutilus) and sterlet (Acipenser ruthenus). The most suitable host fish can vary by locality and population. For...