is a given name deriving from the Germanic words for ''arn'' (eagle) and ''walden'' (to rule). The name had largely disappeared from use by the 19th Century, but was then revived along with many other medieval Germanic names.
- Benedict Arnold , American Revolutionary War general
- Christoph Arnold , German astronomer
- Craig Arnold , American poet
- Eberhard Arnold
- Edwin Arnold , English poet and journalist
- Friedrich Arnold , Anatomist
- Gottfried Arnold
- "Hap" Arnold , American pilot and Air Force commander
- Sir Malcolm Arnold , prolific British composer of classical music
- Mark Arnold , American musician of 2 punk rock groups Big Drill Car and All Systems Go!
- Mary Augusta Arnold , English author, grand-daughter of Thomas Arnold
- Matthew Arnold , English poet, son of Thomas Arnold
- Ruth Metzler-Arnold , Former member of the Swiss Federal Council
- Thomas Arnold , famous schoolmaster of Rugby School, England
- Tom Arnold (academic) , was a 19th century British academic, son of Thomas Arnold of Rugby
- Tom Arnold (actor) , an American actor
- Tom Arnold (politician) , a British politician
- Vladimir Arnold , Russian mathematician
- Saint Arnold
- Arnold, California , USA
- Arnold, Maryland , USA
- Arnold, Michigan , USA
- Arnold, Minnesota , USA
- Arnold, Missouri , USA
- Arnold, Nebraska , USA
- Arnold, Nottinghamshire , England
- Arnold, Pennsylvania , USA
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