Do you mean Padmāvatī Devī’s traditional names that begin with the letter “R”? From the commonly recited 108-names (Aṣṭottara-śatanāmāvalī), the clear “R”-starting name is:

• रोहिण्यै (Rohiṇyai) — the auspicious/star-like one; invokes Padmāvatī’s propitious, protective grace.

Notes

• Many names in the list begin with other letters (Sa, Na, Ma, etc.); only a few begin with “R”. Text order and spellings can vary slightly across pothis.
• “Rakta-Padmāvatī” is a well-known upāsanā-form name used in arādhana traditions; it is a form-epithet rather than a fixed item in every 108-names list.

Traditions

• Both Digambar and Śvetāmbar revere Padmāvatī as Pārśvanāth’s Śāsana-devī; minor variants in the 108-names occur by lineage, but the devotional sense remains the same.

For a simple background on Padmāvatī and her worship: For sahasranāma/namāvalī references: