Sources:
New Unger's Bible Dictionary, article: "Easter"
Alexander Hislop, The Two Babylons, p.134
The American Heritage® Dictionary of the English Language: Fourth Edition. 2000
Encyclopedia Mythica, article: Ostara
Encyclopedia International, China: Lexicon Publications, 1973, p.190
The New Question Box - Catholic Life for the Nineties, copyright 1988 by John J. Dietzen, M.A., S.T.L., ISBN 0-940518-01-5 (paperback), published by Guildhall Publishers, Peoria Illinois, 61651., page 554
W.E. Vine, Merrill F. Unger, William White, Jr., Vine's Complete Expository Dictionary of Old and New Testament Words, article: Easter, p.192
Dictionary.com