Dera ríce

According to the Old English Dictionary:

es;

Dera ríce

n. [Dere the Deirians, ríce a kingdom] The kingdom of the Deirians, Deira; Deirōrum regnum :-- Féng to Dera ríce suscēpit regnum Deirōrum, Bd. 3, 1; S. 523, 9. Se hæfde Dera ríce qui in Deirōrum partĭbus regnum habēbat, 3, 23; S. 554, 8. dera rice