Where does “Tam” come from?

Tam (Scots) comes from Middle English Thomme, from Middle English Thomas, from Latin Thōmās, from Ancient Greek Θωμᾶς, from Aramaic תאומא, from Aramaic תאמא — twin, double; Gemini.

Ancestry of “Tam”, step by step

Step	Language	Word	Meaning
1	Middle English	Thomme	Tom
2	Middle English	Thomas	—
3	Latin	Thōmās	Thomas the Apostle
4	Ancient Greek	Θωμᾶς	Thomas
5	Aramaic	תאומא	twin; Thomas
6	Aramaic	תאמא	twin, double; Gemini

Every word from Aramaic תאמא →Every word from Aramaic תאומא →Every word from Ancient Greek Θωμᾶς →