Etha may refer to:

• Altenstadt Air Base (ICAO code ETHA)
• Saint Etha, an alternate name of the 5th-century Cornish Saint Tetha
• Etna, Nebraska, formerly known as "Etha"
• Etha (wasp), a genus of wasps

• Gurgij
• Gurgir
• Gur Goz
• Gurguieti
• Gurguieţi
• Gurguieți
• Gurgula language
• Gurgulitsa
• Gurguz
• Gurhar Rajputs
• Gur Hasan Ali
• Gur Hasid
• Gurholi
• Guri Amir
• Guri and Gura
• Gurian-e Gora
• Gurian-e Gowra
• Gurian-e Gowreh
• Gurian Gora
• Gurian, Jeffrey
• Guriaso language
• Guri Baba Khan
• Guri, Bushehr
• Guriceel
• Guricel