Sidharth sits next to 5 phonetic neighbors — Siddharth, Siddhartha, and Sidarth are the closest matches by sound. Most share Sidharth's Indian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"one who has accomplished his goal"
"growing, developing"
"ruler of the wise; lord of seers"
"infinite expanse, heavens"
"beautiful sound, melodious"
"one blessed with divine grace, gift of Shiva"
"spiritual brilliance, inner light"
"mighty, strength, warrior"
"immortal, eternal"
"eagle, belonging to the eagle"
"Unparalleled; the singular and absolute"
"infinite divine light"
"love, pure affection"
"the broad one"
"one who destroys evil (name of Shiva)"
Similar sound: These names share phonetic patterns with Sidharth — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Sanskrit origins, giving them the same cultural heritage as Sidharth.
Rhythm: Sidharth is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.