Telma is from the Portuguese Telma — Portuguese rendition of Thelma — coined by Marie Corelli in the 1887 novel from Greek thelēma (will, volition). Telma is one of the Portuguese + Brazilian feminine names. 5-time World Judo Championships medalist.
Telma 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 Telma reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.