The Number System of Welsh (Traditional)

A Playground of Thoughts > Number Systems of the World > The Number System of Welsh (Traditional)

The Number System of Welsh (Traditional)

This page is based on Bilingualism and Number in Wales.

Welsh has two number systems, the traditional system shown below and the modern system, the latter becoming increasingly common.

The traditional system is basically vigesimal (base 20), but it calls 50 "half-hundred" and 19 "two-nine", and it also uses 15 as a reference point.

Number	Reading	Meaning
0	?	-
1	un	1
2	dau	2
3	tri	3
4	pedwar	4
5	pump	5
6	chwech	6
7	saith	7
8	wyth	8
9	naw	9
10	deg	10
11	un ar ddeg	1 on 10^*
12	deuddeg	2^* + 10^*
13	tri ar ddeg	3 on 10^*
14	pedwar ar ddeg	4 on 10^*
15	pymtheg	5^* + 10^*
16	un ar bymtheg	1 on (5^* + 10^*)
17	dau ar bymtheg	2 on (5^* + 10^*)
18	deunaw	2^* × 9
19	pedwar ar bymtheg	4 on (5^* + 10^*)
20	ugain	20
21	un ar hugain	1 on 20^*
22	dau ar hugain	2 on 20^*
23	tri ar hugain	3 on 20^*
24	pedwar ar hugain	4 on 20^*
25	pump ar hugain	5 on 20^*
26	chwech ar hugain	6 on 20^*
27	saith ar hugain	7 on 20^*
28	wyth ar hugain	8 on 20^*
29	naw ar hugain	9 on 20^*
30	deg ar hugain	10 on 20^*
31	un ar ddeg ar hugain	1 on 10^* on 20^*
32	deuddeg ar hugain	(2^* + 10^) on 20^
33	tri ar ddeg ar hugain	3 on 10^* on 20^*
34	pedwar ar ddeg ar hugain	4 on 10^* on 20^*
35	pymtheg ar hugain	(5^* + 10^) on 20^
36	un ar bymtheg ar hugain	1 on (5^* + 10^) on 20^
37	dau ar bymtheg ar hugain	2 on (5^* + 10^) on 20^
38	deunaw ar hugain	(2^* × 9) on 20^*
39	pedwar ar bymtheg ar hugain	4 on (5^* + 10^) on 20^
40	deugain	2^* × 20^*
41	un a deugain	1 and (2^* × 20^*)
42	dau a deugain	2 and (2^* × 20^*)
43	tri a deugain	3 and (2^* × 20^*)
44	pedwar a deugain	4 and (2^* × 20^*)
45	pump a deugain	5 and (2^* × 20^*)
46	chwech a deugain	6 and (2^* × 20^*)
47	saith a deugain	7 and (2^* × 20^*)
48	wyth a deugain	8 and (2^* × 20^*)
49	naw a deugain	9 and (2^* × 20^*)
50	hanner cant	½ × 100
51	hanner cant a un	(½ × 100) and 1
52	hanner cant a dau	(½ × 100) and 2
53	hanner cant a tri	(½ × 100) and 3
54	hanner cant a pedwar	(½ × 100) and 4
55	hanner cant a pump	(½ × 100) and 5
56	hanner cant a chwech	(½ × 100) and 6
57	hanner cant a saith	(½ × 100) and 7
58	hanner cant a wyth	(½ × 100) and 8
59	hanner cant a naw	(½ × 100) and 9
60	thrigain	3^* × 20^*
61	un a thrigain	1 and (3^* × 20^*)
62	dau a thrigain	2 and (3^* × 20^*)
63	tri a thrigain	3 and (3^* × 20^*)
64	pedwar a thrigain	4 and (3^* × 20^*)
65	pump a thrigain	5 and (3^* × 20^*)
66	chwech a thrigain	6 and (3^* × 20^*)
67	saith a thrigain	7 and (3^* × 20^*)
68	wyth a thrigain	8 and (3^* × 20^*)
69	naw a thrigain	9 and (3^* × 20^*)
70	deg a thrigain	10 and (3^* × 20^*)
71	un ar ddeg a thrigain	1 on 10^* and (3^* × 20^*)
72	deuddeg a thrigain	(2^* + 10^) and (3^ × 20^*)
73	tri ar ddeg a thrigain	3 on 10^* and (3^* × 20^*)
74	pedwar ar ddeg a thrigain	4 on 10^* and (3^* × 20^*)
75	pymtheg a thrigain	(5^* + 10^) and (3^ × 20^*)
76	un ar bymtheg a thrigain	1 on (5^* + 10^) and (3^ × 20^*)
77	dau ar bymtheg a thrigain	2 on (5^* + 10^) and (3^ × 20^*)
78	deunaw a thrigain	(2^* × 9) and (3^* × 20^*)
79	pedwar ar bymtheg a thrigain	4 on (5^* + 10^) and (3^ × 20^*)
80	phedwar ugain	4^* × 20
81	un a phedwar ugain	1 and (4^* × 20)
82	dau a phedwar ugain	2 and (4^* × 20)
83	tri a phedwar ugain	3 and (4^* × 20)
84	pedwar a phedwar ugain	4 and (4^* × 20)
85	pump a phedwar ugain	5 and (4^* × 20)
86	chwech a phedwar ugain	6 and (4^* × 20)
87	saith a phedwar ugain	7 and (4^* × 20)
88	wyth a phedwar ugain	8 and (4^* × 20)
89	naw a phedwar ugain	9 and (4^* × 20)
90	deg a phedwar ugain	10 and (4^* × 20)
91	un ar ddeg a phedwar ugain	1 on 10^* and (4^* × 20)
92	deuddeg a phedwar ugain	(2^* + 10^) and (4^ × 20)
93	tri ar ddeg a phedwar ugain	3 on 10^* and (4^* × 20)
94	pedwar ar ddeg a phedwar ugain	4 on 10^* and (4^* × 20)
95	pymtheg a phedwar ugain	(5^* + 10^) and (4^ × 20)
96	un ar bymtheg a phedwar ugain	1 on (5^* + 10^) and (4^ × 20)
97	dau ar bymtheg a phedwar ugain	2 on (5^* + 10^) and (4^ × 20)
98	deunaw a phedwar ugain	(2^* × 9) and (4^* × 20)
99	pedwar ar bymtheg a phedwar ugain	4 on (5^* + 10^) and (4^ × 20)
100	cant	100

* Different form

Indo-European (425)

Albanian (4)

Armenian (2)

Baltic (2)

Celtic (7)

Insular (7)

Brythonic (3)

BRETON
CORNISH
WELSH

Goidelic (4)

Germanic (37)

Greek (6)

Indo-Iranian (302)

Italic (47)

Slavic (18)

Return to the index