What does Sirius mean?
The proper name of the brightest star in the night sky, from Greek 'Seirios' meaning 'scorching' or 'glowing'. Unlike most star names it is Greek rather than Arabic, and the literal sense is 'scorching/glowing' rather than 'star'.
What does Dimitrios mean?
Greek Demetrios, meaning 'follower/devotee of Demeter', the goddess of grain, agriculture and the earth (her name combining a word for 'earth/mother' with 'meter', mother).