What is the meaning of -여?

alternative form of -어 (-eo, infinitive/connective suffix), used after the stem of 하다 (hada).

alternative form of -어 (-eo, infinitive/connective suffix), used after i- and y-stem verbs

Post-vowel allomorphic form of -이여 (-iyeo, “O”, exclamatory vocative particle)

pronunciation spelling of -요 (-yo, politeness-adding particle), representing colloquial Korean

alternative form of -이여 (-iyeo, “and”, dialectal connective particle for enumerating nouns)

See the entry at 여(餘) (yeo, “ somewhat more than”).

Source: wiktionary.org