Where does “Sothiac” come from?

Sothiac (English) comes from French sothiaque, from Ancient Greek σωθιακός, from Ancient Greek Σῶθις, from Egyptian spdt, from Egyptian spd — to be sharp.

Sothiac (English): Alternative form of Sothic: Of or related to the...

Definitions

Alternative form of Sothic: Of or related to the...

Ancestry of “Sothiac”, step by step

Step	Language	Word	Meaning
1	French	sothiaque	—
2	Ancient Greek	σωθιακός	Sothic
3	Ancient Greek	Σῶθις	Sirius
4	Egyptian	spdt	effectiveness; triangle
5	Egyptian	spd	to be sharp

Every word from Egyptian spd →Every word from Egyptian spdt →Every word from Ancient Greek Σῶθις →