Calihan sits next to 3 phonetic neighbors — Callahan, Callan, and Calhoun are the closest matches by sound. Most share Calihan's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"lover of churches, bright-headed"
"shepherd, sheep herder"
"small forest grove"
"ivy plant, climbing vine"
"flourishing, like a flower"
"God has given me a precious gift"
"heron bird, large wading bird"
"one who works at the latticed barrier"
"manly, strong"
"battle, spirit of battle"
"lord, chief, ruler"
"son of Dionysus"
"God has helped, helped by God"
"God hears, gift of God (possible intention)"
"God heals, God supports"
"bright will, shining desire"
"excellent, authentic (slang)"
"holly tree"
"solid, strong"
"red-haired, auburn-haired"
Similar sound: These names share phonetic patterns with Calihan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic ceallach (church) origins, giving them the same cultural heritage as Calihan.
Rhythm: Calihan is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.