History, Creator
In Germany during world war II, all hebrew people, whether in a concentration camp or not were not allowed to practice their religious faith. No community, personal or public expressions.
So they made up names, that to them represented their Divine. They made up songs and dances along with their made up names so they could celebrate God. 
The invitation for each dancer is to have the word Heida have the meaning and interpretation that inspires your heart, whatever is your devotion or Divine of your understanding.