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Found one definition

1.                 From Japanese-English FreeDict Dictionary ver. 0.1:
                   
   
   
                   
                     
   余 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 予 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, よ /jˈo̞/
   1. (余)
    (noun (common) (futsuumeishi))
    (suffix)
   以上・1 (also written as 餘)
   over, more than
   2. (pronoun)
    (nouns which may take the genitive case particle `no')
            Note: archaismformal or oratory first person pronoun, I