Andy sits next to 4 phonetic neighbors — Andie, Randy, and Sandy are the closest matches by sound. Most share Andy's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"manly, brave"
"warrior"
"comforted by God"
"charcoal, dark"
"God is salvation, YHWH saves"
"abundant, bountiful"
"fingernail, claw"
"lion man"
"from Mauritania, North African"
"spear rule"
"son of Ridge"
"gracious, dear"
"the greatest"
"famous land, renowned territory"
"noble bright (adal + beraht)"
"greatest one"
"descendant of the sun god"
"true, faithful"
"battle (possible Irish Gaelic root)"
Similar sound: These names share phonetic patterns with Andy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Andy.
Rhythm: Andy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.