The figure of Shiva as we know him today may be an amalgamation of various older deities into a single figure. How the persona of Shiva converged as a composite deity is not understood, a challenge to trace and has attracted much speculation. According to Vijay Nath, for example:Vishnu and Siva [...] began to absorb countless local cults and deities within their folds. The latter were either taken to represent the multiple facets of the same god or else were supposed to denote different forms and appellations by which the god came to be known and worshipped. [...] Siva became identified with countless local cults by the sheer suffixing of "Isa" or "Isvara" to the name of the local deity, e.g., Bhutesvara, Hatakesvara, Chandesvara."An example of assimilation took place in Maharashtra, where a regional deity named Khandoba is a patron deity of farming and herding castes. The foremost center of worship of Khandoba in Maharashtra is in Jejuri. Khandoba has been assimilated as a form of Shiva himself, in which case he is worshipped in the form of a lingam. Khandoba's varied associations also include an identification with Surya and Karttikeya.