Light, bright, or holy
Aili is a Finnish and Estonian form of Helga or Aila. It is often associated with the meaning of light or brightness, and in its Old Norse roots, it carries the connotation of being holy or blessed.
Less common today
Aili isn't in the latest US Top 1000. It last peaked at #3,565 in 2009.
Norwegian Sami politician and former president of the Sami Parliament
Estonian freedom fighter and activist
US births per 5-year period, 1990βpresent (SSA data).