Saad sits next to 3 phonetic neighbors — Saeed, Saud, and Zad are the closest matches by sound. Most share Saad's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"happiness, good fortune"
"merchant; trader"
"to return (to God)"
"strong, firm"
"great, majestic, exalted"
"worshipper of Allah"
"so be it (amen)"
"strength, power, support"
"God is my strength, strong man of God"
"gate of paradise for those who fast"
"hero of God"
"lion"
"ruler, judge"
"lion"
"son of the prince (elaborated form)"
"all-powerful (divine name Al-Qadir)"
"beauty, adornment, grace"
"one who rejoices"
"destroyer, one who breaks"
"noble, of excellent character"
Similar sound: These names share phonetic patterns with Saad — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic origins, giving them the same cultural heritage as Saad.
Rhythm: Saad is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.