Bible Encyclopedias
Either

International Standard Bible Encyclopedia

ē´thẽr , ı̄´thẽr : Often in the sense still common, "one or the other" (1 Chronicles 21:21; Matthew 6:24 , etc.), but also in the obsolete sense of "both" or "each" (Leviticus 10:1; 1 Kings 7:15; John 19:18; Revelation 22:2 ), or in place of (Revised Version) "or" (Luke 6:42; Luke 15:8; Philippians 3:12; James 3:12 ).

Bibliography Information
Orr, James, M.A., D.D. General Editor. Entry for 'Either'. International Standard Bible Encyclopedia. https://www.studylight.org/​encyclopedias/​eng/​isb/​e/either.html. 1915.