Namesakes
Fictional Characters from Song Titles:
1 character
(character) Matthew Arnold 2014 Matthew Arnold's Field 
Fictional Characters from Television:
6 characters
Jack Arnold 1988 The Wonder Years
Karen Arnold 1988 The Wonder Years
Kevin Arnold 1988 The Wonder Years
Norma Arnold 1988 The Wonder Years
Wayne Arnold 1988 The Wonder Years
Clare Arnold 1990 Beverly Hills, 90210
Nobel Prize Winners:
1 chemistry
(chemistry) Frances Arnold 2018
Notable Actors and Entertainers:
1 actor/comedian
Tom Arnold 1959-
Notable Musicians:
1 composer
David Arnold 1962-
Notable Scientists and Inventors:
1 chemist
Frances Arnold 1956-
Olympic Medalists:
2 bronze
(bronze) Clemens Arnold 2004 field hockey
(bronze) Virginie Arnold 2008 archery - team
Rock and Roll Hall-of-Famers:
1 musician
Jerome Arnold 2015 The Paul Butterfield Blues Band