Nilan sits next to 4 phonetic neighbors — Nolan, Niall, and Milan are the closest matches by sound. Most share Nilan's Indian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"blue, sky-colored"
"Lord Shiva, the divine bestower"
"agile, swift"
"completely free, unbound"
"satisfied, content, quenched"
"free from illusion"
"flowing water, river"
"king of the sky/air"
"courageous, brave"
"essence, nature, world"
"knowledge, sacred wisdom"
"blessing, divine boon, gift from God"
"blessed by Lakshmi"
"fixed, immovable, constant"
Similar sound: These names share phonetic patterns with Nilan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Tamil origins, giving them the same cultural heritage as Nilan.
Rhythm: Nilan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.