余集

complement of a set S (math.) / the set of all x not in set S

to gather / to collect / collected works / classifier for sections of a TV series etc: episode

surname Yu

(archaic) I / me / variant of 餘|余[yu2], surplus

extra / surplus / remaining / remainder after division / (following numerical value) or more / in excess of (some number) / residue (math.) / after / I / me