Jonathan sits next to 3 phonetic neighbors — Jonathon, Nathaniel, and Jonah are the closest matches by sound. Most share Jonathan's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God has given"
"white hawk of battle"
"God is with us"
"my God is the Lord, from Elijah"
"beloved, dear"
"rest, comfort"
"large, great"
"between two hills"
"populous, thriving"
"son of Madoc"
"cask maker, craftsman"
"one who walks"
"son"
"bald, hairless"
"wood, forest; man of the forest"
"strengthened by God"
"tile maker, brick layer"
"griffin (mythical lion-eagle creature)"
"meadow dwelling, water meadow"
"messenger of God"
"appointed by God"
Similar sound: These names share phonetic patterns with Jonathan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew (Yehonatan) origins, giving them the same cultural heritage as Jonathan.
Rhythm: Jonathan is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.