People with the last name Garthwait in Wisconsin
- Aaron Garthwait
- Adeline Garthwait
- Ann Garthwait
- Brennon Garthwait
- Charlotte Garthwait
- Christina Garthwait
- Clark Garthwait
- Diana Garthwait
- Edward Garthwait
- Fay Garthwait
- James Garthwait
- Janet Garthwait
- Jeff Garthwait
- Jeffrey Garthwait
- John Garthwait
- Joseph Garthwait
- Judy Garthwait
- Kyle Garthwait
- Marian Garthwait
- Marie Garthwait
- Matthew Garthwait
- Michael Garthwait
- Norma Garthwait
- Paul Garthwait
- Richard Garthwait
- Sandra Garthwait
- Warren Garthwait
- William Garthwait
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