-en

According to the Old English Dictionary:

J,

-en

m. forms only a few masculine terminations of nouns; as, Þeóden; gen. þeódnes; m. a king, from þeód people: dryhten; gen. dryhtnes; m. a lord, from dryht people, subjects. II. f. -en forms many feminine nouns = the Ger. -in, Dan. -inde; as, Þínen, e; f. a maid-servant [Ger. dienerin], from þén [Ger. diener]; þeówen, e; f. a female slave, from þeów: wylen; gen. wylne; f. the same, from weal a slave: mennen, e; f. a maid-servant, from manna: gyden, e; f. a goddess, from god: munecen, e; f. a nun, from munec: cásern [=cásere + en], e; f, an empress, from cásere: fyxen, e; f. a she-fox, from fox. Also -en forms many nouns of the f. gender [corresponding to the Icel. -n, -in] ; as, Segen; gen. segne; f. tradition, saying, Icel. sögn: gýen, e; f. heed, care: byrgen, e; f. a tomb: sylen, e; f. a gift: byrðen, e; f. a burden: hiwrǽden; gen. hiwrǽdenne; f. a family, house: and several others in -rǽden; as, Gecwyd-rǽden, e; f. an agreement, contract: mǽg-rǽden, e; f. relationship: gefér-rǽden, -rǽdenn, e; f. a train, company, congregation. III. some nouns in -en are neuters [corresponding to the Icel. -in, -en]; as, Mægen, es; n. strength, might = Icel. megin, magn: mǽden, es; n. a maiden: wésten, es; n. a waste, desert: swefen, es; n. a dream : midlen, es; n. a middle: fæsten, es; n. a fortress, fastness. -en,en