Lavonne is a 20th-century American name — the prefix La- combined with Yvonne (French "yew, young archer"). Wrigley to keep baseball alive during World War II and is enshrined in the National Baseball Hall of Fame (1988). Lavonne Andrews — American author. Lavonne Roberts — journalist. The name peaked during the 1930s-40s and is now considered a vintage revival candidate alongside Yvonne and Simone.
Lavonne 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 Lavonne reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.