From en.wiktionary.org:
[ivory]
** English
*** Etymology
The surname is habitational from [fr] in Normandy, and in some cases
patronymic from a diminutive of [en]. The modern given name is associated
with [en].
*** Proper noun
[en-proper noun]
1. [en] .
2. [en] .
3. [en] .
4. * {{ quote-book | en | year=2004 | author=w:Annie Proulx | title=Bad Dirt: Wyoming Stories 2 | publisher=HarperCollins UK | year_published=2010 | isbn=9780007290130
|passage=Charlie Parrott wasn't fooled and told Linny to walk softly. The
girl's name had been picked from a baby-name book which reflected a brief
fashion of naming girls for expensive wedding gifts of an earlier time—Linen,
Silver, Crystal, IVORY.}}
[en]