Where does “Balmer” come from?

I need to flag a significant problem: the etymology chain provided doesn't support the headword "Balmer" at all. The chain traces "balm" (a fragrant resin/soothing substance), not "Balmer," which appears to be a surname or technical term (possibly from physics—the Balmer series). I cannot write an accurate one-sentence etymology for "Balmer" using a chain for "balm," as this would violate the core rule: "State only what the chain supports." **I need clarification:** - Is the headword "balm" (not "Balmer")? - Or is there a different etymology chain for "Balmer"? If the headword should be "balm," here's the sentence: Balm comes from Middle French baume, from Latin balsamum, a word for fragrant resin used for soothing,