Because they carried two people - like Gemini the twins.
Gemini is also known as The Twins. They are "charming people-pleasers".
Gemini stands for "The Twins".
The twins
SYMBOL FOR GEMINI:The symbol of Gemini is usually twins or The Roman numeral for 2. Check it out on ask.com
Gemini means the Twins.
Gemini, "The Twins" was named after a set of twins in mythology, Castor and Pollux.
Gemini is the twins, Castor and Pollux.
Gemini is depicted by the sign of The Twins.
The Gemini sign is of twins.
Gemini is the Latin word to describe the twins Castor and Pollux. They also appear in Green mythology as the "Dioscuri".
It was named after the constellation Gemini (twins).