Where does “Acrux” come from?

Acrux (English) comes from English alpha, from Ancient Greek ἄλφα, from Phoenician 𐤀𐤋𐤐, from Proto-Semitic *ʔalp- — thousand.

Ancestry of “Acrux”, step by step

Acrux traces back through two separate lines of ancestry.

via English alpha

StepLanguageWordMeaning
1EnglishalphaThe name of the first letter of the Greek...
2Ancient Greekἄλφαalpha, the name for the first letter Α, α of the...
3Phoenician𐤀𐤋𐤐thousand; bull, ox, head of cattle
4Proto-Semitic*ʔalp-thousand

via English Crux

StepLanguageWordMeaning
1EnglishCruxA distinctive winter constellation of the southern sky, shaped like a cross. It appears in the flags of several countries in Oceania
2Latincruxwooden frame on which criminals were crucified,...
3Proto-Italic*kruks
4Proto-Indo-Europeansḱer-to caw, crow
Every word from Proto-Semitic *ʔalp-Every word from Phoenician 𐤀𐤋𐤐Every word from Ancient Greek ἄλφα