how did this bright star gets its name?
Its name is derived from the Greek word "Seirios" "glowing" or "scorching".
Sirius
 Its name is derived from the Greek word "Seirios" "glowing" or "scorching".
cma (canis majoris) is so bright it is visible near the rising sun but is better known as Canis Major is a constellation which contains Sirius, the brightest star in the night sky
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Sirius [SEP] Introduction
Sirius (, designated α Canis Majoris (Latinized to Alpha Canis Majoris, abbreviated Alpha CMa, α CMa)) is the brightest star in the night sky. Its name is derived from the Greek word "Seirios" "glowing" or "scorching". With a visual apparent magnitude of −1.46, Sirius is almost twice as bright as Canopus, the next brightest star. Sirius is a binary star consisting of a main-sequence star of spectral type A0 or A1, termed Sirius A, and a faint white dwarf companion of spectral type DA2, termed Sirius B. The distance between the two varies between 8.2 and 31.5 astronomical units as they orbit every 50 years.