Where does “Aguś” come from?

Aguś (Polish) comes from Polish Agata, from Latin Agatha, from Ancient Greek Ἀγαθή, from Ancient Greek ἀγαθός, from Proto-Hellenic əgatʰós, from Proto-Indo-European m̥ǵh₂-dʰh₁-ós, from Proto-Indo-European dʰeh₁- — to do, put, place.

Ancestry of “Aguś”, step by step

Aguś traces back through two separate lines of ancestry.

via Polish Agata

Step	Language	Word	Meaning
1	Polish	Agata	—
2	Latin	Agatha	now Agde
3	Ancient Greek	Ἀγαθή	—
4	Ancient Greek	ἀγαθός	good, brave, noble, moral; fortunate, lucky;...
5	Proto-Hellenic	əgatʰós	good
6	Proto-Indo-European	m̥ǵh₂-dʰh₁-ós	made great; whose deeds are great
7	Proto-Indo-European	dʰeh₁-	to do, put, place

via Polish Agnieszka

Step	Language	Word	Meaning
1	Polish	Agnieszka	—
2	Polish	-ka	feminine noun suffix; diminutive noun suffix;...
3	Old Polish	-ka	feminine noun suffix
4	Proto-Slavic	-ъka	Denominal, forms diminutives; Deadjectival,...
5	Proto-Indo-European	-kos	Creates deadjectival and desubstantival...

Every word from Proto-Indo-European dʰeh₁- →Every word from Proto-Indo-European m̥ǵh₂-dʰh₁-ós →Every word from Proto-Hellenic əgatʰós →