Given that autism as it's currently understood in our modern context only came about in the early 20th century, it would be highly speculative for historians to assume a condition being described in historical records is referring to autism. Heck, even our understanding and definition of autism has changed throughout the 20th century, so that complicates your questiom even further. You might find people inferring medical conditions a person described in a historical record might have, but a responsible scholar has to take such speculations with an enormous grain of salt.