What was the first calculator called?

That would be an Abacus.
Depends if you mean the electronic calculator or not? Before we had calculators we had slide rulers. In 1632, the circular and rectangular sliderule was invented by W. Oughtred. William Seward Burroughs invented the first practical adding and listing machine. Burroughs submitted a patent application in 1885 for his 'Calculating Machine' and the patent was awarded in 1888.