Diago sits next to 3 phonetic neighbors — Diego, Iago, and Tiago are the closest matches by sound. Most share Diago's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"supplanter"
"my wrestling, struggle"
"new house, bright place"
"battle cry"
"he who has the people distressed"
"follower of Dionysus, god of wine"
"steadfast, firm as a rock"
"God with us, divine presence"
"young goat (shield bearer)"
"firebrand, sword blade"
"ruler of the home, home ruler"
"youthful, downy-bearded"
"gift of God"
"manly, strong"
"my God is my help"
"celestial realm, paradise"
"follower of Christ, Christian"
"of the earth, earth-born"
"from denarius, silver coin"
"the greatest"
"bright north, famous northerner"
Similar sound: These names share phonetic patterns with Diago — 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 Diago.
Rhythm: Diago is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.