An Etymological Dictionary of Astronomy and Astrophysics

A cardinal number whose symbol is 5, V, or ۵.

Etymology (EN): Five, from
O.E. fif, from P.Gmc. *fimfe (cf. O.S. fif, O.H.G. funf), from PIE *penk^we “five;” cognate with Pers. panj, as below.

Etymology (PE): Panj, from Mid.Pers. panj; Av. panca; cf.
Skt. páñca; Gk. pente; L. quinque; E. five, as above.