Lucena sits next to 4 phonetic neighbors — Lucia, Luciana, and Lorena are the closest matches by sound. Most share Lucena's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"light, illumination"
"well-born, noble (from Eugenia)"
"beloved"
"gift of the sea"
"shining glory"
"flower; blooming"
"mankind, human being"
"star, stars"
"little bramble; of the thornbush; possibly auburn-hued"
"gift of God"
"settlement on a cliff"
"drop of the sea, sea of bitterness"
"mountain peak"
"star"
Similar sound: These names share phonetic patterns with Lucena — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Lucena.
Rhythm: Lucena is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.