Ge-twin

According to the Old English Dictionary:

es;

ge-twin

m. A twin :-- Geminus ðæt is on úre geþeóde getwyn geminus, that is in our language twin, Shrn. 155, 30. Hí wǽron getwinnas they were twins, 92, 22: 134, 23. Salm. Kmbl. 729; Sal. 364: 216; Sal. 107[?]. [Cf. O. H. Ger. zwinal, ge-zuinele geminus.] ge-twin