# Definition:Number Names/Welsh

## Definition

These are the names of the numbers in Welsh:

 $(1)$ $:$ un $(2)$ $:$ dau, dwy $(3)$ $:$ toi, tair $(4)$ $:$ pedwar, pedair $(5)$ $:$ pump (or pum) $(6)$ $:$ chwech (or chwe) $(7)$ $:$ saith $(8)$ $:$ wyth $(9)$ $:$ naw $(10)$ $:$ deg $(11)$ $:$ un ar ddeg $(12)$ $:$ deuddeg $(13)$ $:$ toi ar ddeg, tair ar ddeg $(14)$ $:$ pedwar ar ddeg, pedair ar ddeg $(15)$ $:$ pymtheg $(16)$ $:$ un ar bymtheg $(17)$ $:$ dau ar bymtheg, dwy ar bymtheg $(18)$ $:$ deunaw $(19)$ $:$ pedwar ar bymtheg, pedair ar bymtheg $(20)$ $:$ ugain $(30)$ $:$ deg ar hugain $(40)$ $:$ dugain $(50)$ $:$ deg ar deugain or hanner cant $(60)$ $:$ trigain $(70)$ $:$ trigain a deg or deg ar thrigain $(80)$ $:$ pedwar ugain $(90)$ $:$ pedwar ugain a deg or deg a phedwar ugain $(100)$ $:$ cant

The different forms for $2$, $3$, $4$ and their derivatives are for masculine and feminine.

The different forms for $5$ and $6$ are elisions for use in front of certain letters.

The different forms for $50$, $70$ and $90$ are separate ways of saying the numbers.

Note:

there are no distinct words for $11$ and $12$, indicating that there has been less influence of duodecimal systems on Welsh
there are clear indications of base $5$ and vigesimal influences as well as decimal
the interesting forms for $18$ (expressed as $2 \times 9$) and $50$ (expressed both as $10 + 40$ and $\dfrac 1 2 \times 100$).