The name Einar is a boy's name meaning "bold warrior". Einar and is often added to lists like Names with Military Meanings and discussed in our forums with posts like "A brother or sister for little Jack or Olivia".
From the experts:
With Norse (and pseudo-Norse) names such as Thor, Odin and Magnus growing in popularity, this one, which refers to warriors destined for Valhalla on account of their bravery, might have some appeal outside Scandinavia. Its slightly Eeyore-ish sound is balanced out by connections to some major historical figures, including a Norwegian prime minister.