Where does “bibliotekarka” come from?

bibliotekarka (Polish) comes from Polish bibliotekarz, from Polish biblioteka, from Spanish biblioteca, from Latin bibliothēca, from Ancient Greek βιβλιοθήκη, from Ancient Greek -θήκη, from Ancient Greek θήκη, from Ancient Greek τίθημι — to do, put, place.

Ancestry of “bibliotekarka”, step by step

Step	Language	Word	Meaning
1	Polish	bibliotekarz	librarian
2	Polish	biblioteka	library
3	Spanish	biblioteca	library; bookcase
4	Latin	bibliothēca	a library room for books or collection of books
5	Ancient Greek	βιβλιοθήκη	bookcase; library; records office
6	Ancient Greek	-θήκη	deverbal suffix, typically indicating a space in which things are put or stored
7	Ancient Greek	θήκη	box, chest; grave, tomb; sword sheath
8	Ancient Greek	τίθημι	I put, place, set; I make, cause to be; I make
9	Proto-Indo-European	dʰeh₁-	to do, put, place

Every word from Proto-Indo-European dʰeh₁- →Every word from Ancient Greek τίθημι →Every word from Ancient Greek θήκη →