From the English surname Sidney. It was first used as a given name in honour of executed politician Algernon Sidney (1622-1683). Another notable bearer of the surname was the poet and statesman Sir Philip Sidney (1554-1586).
Means “petition, request” in Hebrew. In the Old Testament this is the name of a son of Judah. English bibles also use this spelling to render the unrelated Hebrew name שֵׁלָח (see Shelach), a grandson of Shem.
People with the name Martini have a deep inner desire to use their abilities in leadership, and to have personal independence. They would rather focus on large, important issues, and delegate the details.