While the traditional Akshara is based on Sanskrit pronunciation (like 'Dha' or 'Tha'), you can choose English spellings that suit your preference (e.g., Dhruv vs. Druv, Thara vs. Tara), as long as the phonetic sound matches the Nakshatra's requirement.
For broadly, the auspicious starting letters often include D, Ch, Z, and Th . Meena Rashi Uttarabhadra Nakshatra Names for Boys meena rashi uttarabhadra nakshatra names
spans 3°20' to 16°40' Pisces . The prescribed syllables (birth stars) for naming are: While the traditional Akshara is based on Sanskrit