Where does “artitianus” come from?

artitianus (Latin) comes from Latin artitus, from Latin artire, from Latin ars, from Proto-Italic artis, from Proto-Indo-European h₂értis, from Proto-Indo-European h₂er- — to fit, to fix, to put together.

Ancestry of “artitianus”, step by step

Step	Language	Word	Meaning
1	Latin	artitus	skilled
2	Latin	artire	to instruct in arts
3	Latin	ars	art; skill, craft, handicraft, trade, power
4	Proto-Italic	artis	—
5	Proto-Indo-European	h₂értis	fitting
6	Proto-Indo-European	h₂er-	to fit, to fix, to put together

Every word from Proto-Indo-European h₂er- →Every word from Proto-Indo-European h₂értis →Every word from Proto-Italic artis →