Ramadevar (Yacob) — Tamil Siddhar

Ramadevar, popularly identified in certain siddha traditions with a figure called Yacob or Yakub, is one of the most historically debated and cross-culturally intriguing of the eighteen Siddhars, with some lineages claiming he was originally a foreign traveler, possibly of Middle Eastern or Abrahamic background, who journeyed to Tamil Nadu, underwent profound conversion through contact with Tamil siddha masters, and was subsequently initiated into the tradition under the name Ramadevar. This narrative, while difficult to verify historically, is cherished within siddha oral tradition as testimony to the universality of the path, illustrating that spiritual truth as taught by the Siddhars transcends any particular ethnic, national, or prior religious identity, and that sincere seekers from any background can be fully absorbed into the lineage upon demonstrating genuine commitment and realization. Ramadevar is remembered as a devoted disciple within the Palani-centered siddha circle, closely associated with Bogar, and is credited with composing devotional verses to Muruga using imagery and phrasing that some scholars note carries traces of a non-native linguistic sensibility, lending some support to the foreign-origin narrative. His teachings stress radical humility, the dissolving of prior identity and ego attachment to nationality or inherited religion, and complete surrender to the guru and to Muruga as the gateway to liberation, a message that resonated strongly with converts and marginalized seekers throughout Tamil Nadu's devotional history.

Ramadevar's medicinal legacy, closely intertwined with the Palani siddha circle's alchemical tradition, includes contributions to kaya kalpa formulations and herbal-mineral compounds for treating chronic digestive and respiratory ailments, often prepared using techniques he is said to have learned directly from Bogar. Some traditions credit him with introducing certain foreign herbal knowledge or preparation techniques encountered during his travels prior to his conversion, subtly enriching the existing Tamil pharmacopeia with additional plant identifications. His prescriptions emphasize humility and simplicity in diet as moral as well as physical discipline, reflecting his broader teaching that surrender of ego extends even into one's relationship with food, appetite, and bodily indulgence.