Harvester or from Thessaly
Telsa is a rare variant of the name Tessa, which itself is a diminutive of Theresa. It is derived from the Greek name Therasia, meaning 'to harvest' or referring to the region of Thessaly. In modern times, it is occasionally chosen as a phonetic play on the surname Tesla.
Less common today
Telsa isn't in the latest US Top 1000. It last peaked at #8,261 in 1990.
US births per 5-year period, 1990βpresent (SSA data).