Tuples ( Latin Numerals )

Tuple#Names for tuples of specific length

The term originated as an abstraction of the sequence: single,  double, triple, quadruple, quintuple, sextuple, septuple, octuple, ..., n‑tuple, ..., where the prefixes are taken from the Latin names of the numerals. The unique 0‑tuple is called the null tuple. A  1‑tuple is called a singleton, a 2‑tuple is called an ordered pair and a  3‑tuple is a triple or triplet. n can be any non negative integer. For example, a complex number can be represented as a 2‑tuple, a quaternion can be represented as a 4‑tuple, an octonioncan be represented as an 8‑tuple and a sedenion can be represented as a 16‑tuple.
Although these uses treat ‑tuple as the suffix, the original suffix was ‑ple as in "triple" (three-fold) or "decuple" (ten‑fold). This originates from a medieval Latin suffix ‑plus(meaning "more") related to Greek ‑πλοῦς, which replaced the classical and late antique‑plex (meaning "folded"), as in "duplex".[3]

Names for tuples of specific lengths
1 single
2 double
3 triple/treble
4 quadruple
5 quintuple pentadruple
6 sextuple hexatruple
7 septuple
8 octuple
9 nonuple
10 decuple
11 undecuple hendecuple
12 duodecuple
13 tredecuple
100 centuple

Another article about this: tuple#see also

You can find the Latin numerals easily by a simple google search
Appendix:Latin cardinal numerals
A Brief Guide to Latin Numerals