Where does “testator” come from?

testator (Latin) comes from Latin testārī, from Italian testare, from English Test, from German testen, from German Test, from English test, from Middle English teste, from Old French teste — to stand.

testator (Latin): testator; witness; second-person singular future...

Definitions

testator; witness; second-person singular future...

Ancestry of “testator”, step by step

testator traces back through two separate lines of ancestry.

via Latin testārī

Step	Language	Word	Meaning
1	Latin	testārī	—
2	Italian	testare	To be testate; To test; to sample
3	English	Test	a Test match
4	German	testen	to test
5	German	Test	test; melting pot
6	English	test	A challenge, trial; A cupel or cupelling hearth...
7	Middle English	teste	—
8	Old French	teste	head
9	Latin	testis	witness; one who testifies or attests; testicle
10	Latin	terstis	—
11	Latin	trīstis	sad, unhappy, melancholy, morose
12	Proto-Indo-European	tristh₂s	a third party standing, after the two parties to...
13	Proto-Indo-European	steh₂-	to stand

via Latin testor

Step	Language	Word	Meaning
1	Latin	testor	I am witness, testify, attest; I make a will
2	Latin	-ō	suffixed to nouns or adjectives. Originally a-stem nouns. Later extended to nouns with other stems. Forms regular first-conjugation verbs
3	Proto-Indo-European	-ō	Derives nouns from roots

Words derived from “testator”

Every word from Proto-Indo-European steh₂- →Every word from Proto-Indo-European tristh₂s →Every word from Latin trīstis →