Blend of Nell (from Eleanor or Helen, meaning light) with the suffix -da.
Nellda is a blend of Nell, from Eleanor or Helen meaning light, with the suffix da. That makes it a name with a vintage diminutive feel, echoing older English and American naming styles that favored soft, affectionate extensions.
The core associations of light and brightness give the name a pleasant, gentle foundation. Nellda sounds dated in the charming sense, like a name from another era that is now newly interesting again. It has warmth, brevity, and a slightly old-fashioned grace.
Because it is rare, it does not feel overexposed, which helps it retain its nostalgic appeal. Nellda is simple, soft, and quietly luminous.