John Trapp on Luke 8:3

Verse 3. Joanna the wife of Chuza, Herods steward] Or Treasurer, as the Arabick calleth him: his Vicar-Generall, or Protetrach. This Court-Lady followeth Christ: so did Serena the Empresse, who was therefore Martyred by her husband Diocletian. So Elizabeth Luth, in Epist. ad Jo. Agricol. Queen of Denmark; of whom Luther testifieth, that she died a faithfull professour of the Reformed Religion: and addeth, Scilicet Christus etiam aliquando voluit Reginam in coelum vehere. Christ would once save a Queen; which he doth not often.