Sól (Old Norse: "sun") — also spelled Sol in Spanish and Portuguese — has multiple traditions: the Norse goddess Sól drives her chariot across the sky each day, pursued by the wolf Sköll who will devour her at Ragnarök; in Spanish, Sol means "sun" and is a common feminine name. Sól is the only personification of the Sun as feminine in the major Indo-European traditions (Greek and Roman sun-gods are male).
Featured in the Poetic Edda Vafþrúðnismál and Sólarljóð.
Sól does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
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In Pythagorean numerology the letters of Sól reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.