-ian
-ian
suff.
1. Of, relating to, or resembling: Bostonian.
2. One relating to, belonging to, or resembling: academician.
[Middle English -ien, -ian, from Old French -ien, from Latin -iānus, adj. and n. suff.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
-ian
suffix
[from Latin -iānus]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
-ian
a suffix with the same meaning and properties as -an1; -ian is now the more productive of the two suffixes in recent coinages, esp. when the base noun ends in a consonant: Orwellian; Washingtonian.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.