Israel – The name that was given to Jacob after he overcomes the angel of the other-side (Genesis 35:10).
The children of Israel, Israelites that have souls with the ability to connect to the three columns of the Tree of Life.
Zeir Anpin is also called Israel because the middle point is Tiferet, Jacob connects upper Leah, and lower, Rachel.
שיר – אל
לי – ראש