Frenn may refer to the following people:

• Chawky Frenn, American (born in Lebanon) artist, art professor and author
• George Frenn (1941–2006), American hammer thrower, weight thrower and powerlifter
• Jason Frenn (born 1966), American evangelist and author
• Frenn, a character of The Echorium Sequence (1999–2001) by Katherine Roberts

• List of Finnish Navy ships
• List of Finnish noble families
• List of Finnish poets
• List of Finnish radio stations
• List of Finnish singers
• List of Finnish television channels
• List of Finnish Wars
• List of finns
• List of FIPS region codes (A–C)
• List of FIPS region codes (D–F)
• List of FIPS region codes (G–I)
• List of FIPS region codes (J–L)
• List of FIPS region codes (M–O)
• List of FIPS region codes (P–R)
• List of FIPS region codes (S–U)
• List of FIPS region codes (V–Z)
• List of FIP title reigns by length
• List of Fireball XL5 episodes
• List of Firebird characters
• List of Fire Commissioners of the City of New York
• List of fire drill regulations for schools in the United States
• List of Fire Emblem: Genealogy of the Holy War characters
• List of Fire Emblem: Path of Radiance characters
• List of Fire Emblem: Radiant Dawn characters
• List of Fire Emblem: Shadow Dragon characters