Ivar sits next to 4 phonetic neighbors — Ivan, Iver, and Ivor are the closest matches by sound. Most share Ivar's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"yew warrior, bow warrior"
"home power, estate ruler"
"man of the people"
"divine spear, god's spear"
"power of peace"
"a musical lament (the linos song)"
"peaceful ruler"
"shoulder, axle (folk etymology)"
"home ruler, lord of the house"
"star (folk etymology)"
"gift of God"
"sky, heavens"
"bold, daring (thunder-bold)"
"noble elder"
"protector of mankind"
Similar sound: These names share phonetic patterns with Ivar — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Norse origins, giving them the same cultural heritage as Ivar.
Rhythm: Ivar is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.