Hillel sits next to 4 phonetic neighbors — Hillal, Hal, and Eli are the closest matches by sound. Most share Hillel's Hebrew-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"shining one, luminous"
"son of the right hand"
"Yahweh is my strength"
"miracle of God"
"my judge"
"highest point, mountaintop"
"God raises up"
"my flock belongs to God"
"jewel, ornament"
"God strengthens"
"my God"
"faithfulness, reliability"
"descent"
"Yahweh is He; God lives"
"consecrated, dedicated to God"
"God protects, God watches over"
"vision of God"
"to guard, to keep watch"
"beauty"
Similar sound: These names share phonetic patterns with Hillel — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Hillel.
Rhythm: Hillel is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.