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"
"may God give strength"
"God has been gracious"
"faithfulness, reliability"
"thunder of God"
"God is my judge"
"God strengthens"
"eternal ruler (variant of Erik)"
"like the sun"
"gift of God, Yahweh has bestowed"
"rest, comfort"
"son of the south"
"none compares to God"
"exalted father (earlier form Avram)"
"beauty"
"gift of Isis"
"he shall descend"
"fragrant, perfume"
"dog (loyal companion)"
"my flock belongs to God"
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.