ADELANTADOS (singular Adelantado or Adelantatus ), one of the designations applied in documents of Christian *Spain to the parnasim, elective members of the Jewish community board who were invested with executive authority. They are sometimes referred to in Castile as viejos (Heb. zekenim; "elders") or muquddāmin, in Catalonia as fideles (Heb. ne'manin; "trustees"), and in Aragon and Navarre both as muqaddāmin and as jurados.
Neuman, Spain, index s.v. mukkadmin.