- Proto-Hindo-Ewropaki ra *penkwe-komt- ("pancas")
- Proto-Aryaki ra
- Ewıstki: pancāsat- ("pancas")
- Soğdki: panc's ("pancas")
- Pehlewki: panjāh ("pancas")
- Farski: panjāh ("pancas")
- (Zazaki: pānjās) Alfabeyê Ariki
- Sanskritki: pancāśát- ("pancas")
- Yunanki: pentêkonta ("pancas")
- Latinki: quinquāgintā ("pancas")
- Watkins, Calvert. The American Heritage Dictionary of Indo-European Roots, 2nd ed., Houghton Mifflin Co., 2007. *Amazon.com ra,
- Lubotsky, Alexander. Indo-Aryan inherited lexicon . University of Leiden.
- Lubotsky, Alexander. The Indo-Iranian substratum. 1999. [1],
- Julius Pokorny's Indo-European Etymological Dictionary
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