Rosemary Theby's 6 syllables sit just outside the ideal 3–5 range.
Rosemary and Theby have a workable rhythm — close to the perfect punch.
Rosemary Theby's softer consonants cost it screen presence.
Rosemary Theby misses the alliteration hook that makes names stick.
Rosemary (8 letters) and Theby (5) have a slight length mismatch, but it reads fine on screen.
Rosemary Theby's sounds flow naturally in English — easy to say and remember.
Rosemary Theby's open vowels roll off the tongue — warm and screen-ready.