Charles Duffy may refer to:

• Charles Gavan Duffy (1816–1903), Irish nationalist, journalist, poet and Australian politician
• Charles John Duffy (1919–1941), U.S. Navy officer

• Guru Gorakhnath
• Guru Gorkhnath
• Guru Govind Singh
• Guru Granth
• Guru Granth Sahib statements about women
• Guru Guru
• Guruguru Eigakan
• Guruguru Mountain
• Guru Guru Pon-chan
• Guru Harkrishan
• Guru Harkrishan Public School
• Guru Harkrishan Public School, Nanak Piao
• Guru Har Sahai
• Guruism
• Guru-ism
• Guru Jambheshwar University of Science and Technology
• Guru Jamdeshwar
• Guru Josh
• Guru ka Langar
• Gurukanth
• Guru Kelucharan Mahapatra
• Guru Kelu Nair
• Guru kiran
• Gurukiran
• Gurukiran discography