Where does “chīrographum” come from?

chīrographum (Latin) comes from Ancient Greek κειρόγρᾰφον, from Ancient Greek κειρόγρᾰφος — handwritten.

Ancestry of “chīrographum”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	κειρόγρᾰφον	—
2	Ancient Greek	κειρόγρᾰφος	handwritten

chīrographum — Etymology, Origin & Word History | Etymology Explorer