Pilar sits next to 4 phonetic neighbors — Pilar, Cesar, and Omar are the closest matches by sound. Most share Pilar's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pillar, column"
"from the flowering place"
"botanical variant name"
"raven"
"of noble birth"
"olive tree; symbol of peace and wisdom"
"from Flanders, Flemish person"
"small, little"
"24-hour period"
"the strait, narrow waterway"
"stony forest"
"The great; the large"
Similar sound: These names share phonetic patterns with Pilar — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin pila origins, giving them the same cultural heritage as Pilar.
Rhythm: Pilar is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.