Where does “Μάρθα” come from?

Μάρθα (Ancient Greek) comes from Aramaic מַרְתָּא, from Aramaic מרה.

Ancestry of “Μάρθα”, step by step

Step	Language	Word	Meaning
1	Aramaic	מַרְתָּא	the mistress; mistress
2	Aramaic	מרה	—

Μάρθα — Etymology, Origin & Word History | Etymology Explorer