I was gonna say they're: "Spelled differently (true) and are distinct, unrelated materials (false!)". So I ended up correcting myself.

Silicone is literally made from silicon. Manufacturing starts with silica (SiO₂, found in sand/quartz), which is reduced to elemental silicon, then reacted with methyl chloride to form methylchlorosilanes, which are then polymerized into silicone.

The name "silicone" was actually coined in 1901 by English chemist Frederick Kipling, who thought the compounds R₂SiO resembled ketones (hence "-one" suffix): the naming turns out to be a bit of a misnomer chemically, but it stuck.