Akka is from the Kannada akka (ಅಕ್ಕ — elder sister) — honorific used for the Lingayat saint Akkamahadevi. Akkamahadevi (c. 1130-1160) was a 12th-century Kannada poet and prominent figure in the Lingayat (Veerashaiva) Bhakti movement of Karnataka — alongside Basavanna, Allama Prabhu, and Channabasavanna. Her samadhi is at Srisailam, Andhra Pradesh.
and Lingayat Bhakti tradition.
Akka 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.
In Pythagorean numerology the letters of Akka reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.