Where does “ceannairgead” come from?

ceannairgead (Irish) comes from Irish ceann, from Middle Irish cenn, from Old Irish cenn, from Proto-Celtic Kʷennowindos, from Proto-Celtic windos, from Proto-Indo-European windo-, from Proto-Indo-European weyd- — to see.

ceannairgead (Irish): head-money, poll-tax

Definitions

head-money, poll-tax

Ancestry of “ceannairgead”, step by step

ceannairgead traces back through two separate lines of ancestry.

via Irish ceann

Step	Language	Word	Meaning
1	Irish	ceann	head; head of cabbage, capitulum; end, extremity
2	Middle Irish	cenn	head; end
3	Old Irish	cenn	head; end
4	Proto-Celtic	Kʷennowindos	white-headed, white-faced
5	Proto-Celtic	windos	white
6	Proto-Indo-European	windo-	—
7	Proto-Indo-European	weyd-	to see

via Irish airgead

Step	Language	Word	Meaning
1	Irish	airgead	silver; money, sum of money
2	Irish	-óir	-er; suffix appended to words to create an agent...
3	Old Irish	-óir	er, -or
4	Proto-Brythonic	-ọr	—
5	Latin	-ārius	er
6	Proto-Italic	*-āzios	Forms relational adjectives to nouns (and rarely numerals)

Every word from Proto-Indo-European weyd- →Every word from Proto-Indo-European windo- →Every word from Proto-Celtic windos →