I think it is a variant spelling of sanjit. saM is a prefix that means together or synergistically, ji means to conquer, and the unaspirated dental t appears after short vowels when verbs are transformed, without an otherwise visible suffix, to nouns indicating the doer. The verb saM-ji (in which M becomes a nasal palatal sound) does mean conquer together, but that prefix is too subtle to translate in the noun sanjit, best to render it winner.
The short closed a in Sanskrit is closer to the u in cut and sun than to a in cat and tan, and not only in length. In modern Indian languages it varies, but in the Hindi belt, the Sanskrit sound of short a survives.