Vishnu sits next to 3 phonetic neighbors — Vishwa, Krishna, and Vishal are the closest matches by sound. Most share Vishnu's Indian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"all-pervading, the preserver"
"dawn, beginning of a new day"
"share of the brave"
"full of life, lively"
"rays of the sun; life-giving"
"lotus flower"
"courage, bravery"
"single portion, one part"
"excellent, the best, superior"
"divine, belonging to Shiva"
"innate, born-with quality"
"intelligent, charming, clever"
"Dawn; sunrise; new beginning"
"hero, brave man"
"one with great strength and bravery"
"auspicious and skilled one"
"victorious hero"
"grace of Shiva"
"brave, heroic"
Similar sound: These names share phonetic patterns with Vishnu — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Sanskrit origins, giving them the same cultural heritage as Vishnu.
Rhythm: Vishnu is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.