Diego sits next to 3 phonetic neighbors — Iago, Tiago, and Diago are the closest matches by sound. Most share Diego's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"beloved, may God protect"
"supplanter (via James/Jacob)"
"follower of Christ; anointed one"
"God will add, God will increase"
"ruler of the estate"
"farmer, earthworker"
"from the city of Milan"
"revered, worthy of respect"
"gift of God"
"raised by Yahweh"
"Italian form of John, gift of God"
"from Hadria, of the Adriatic"
"God has shown favor"
"God is willing"
"man from Lucania"
"Priceless; of inestimable worth"
"From France"
"protector of people"
"who resembles God"
Similar sound: These names share phonetic patterns with Diego — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via Latin origins, giving them the same cultural heritage as Diego.
Rhythm: Diego is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.