People with the last name Fennig in Illinois
- Alvin Fennig
- Bob Fennig
- Bonnie Fennig
- Brian Fennig
- Daniel Fennig
- David Fennig
- Donald Fennig
- Heather Fennig
- James Fennig
- Jamese Fennig
- Jim Fennig
- John Fennig
- Karl Fennig
- Kelli Fennig
- Loretta Fennig
- Marian Fennig
- Marie Fennig
- Mohamed Fennig
- Nancy Fennig
- Otto Fennig
- Patrick Fennig
- Penelope Fennig
- Robert Fennig
- Roberta Fennig
- Thomas Fennig
- Tommy Fennig
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