In Medieval records "late of" would have been a translation of nuper, which could have a few shades of meaning, depending on context. In the case of "my manor of Newport, late of John Smith", it means formerly, without indication of whether John Smith is living or dead. In Common Pleas and Kings bench records, people are usually recorded as "John Smith, nuper de Newport", or "late of Newport". Here it means at one time, when the lawsuit was begun, and possibly still. Here the presumption is that John Smith is still alive. If a litigant died, then the lawsuit would continue in the name of their administrator or executor. This was not always the case. Communication was slow, so John Smith might still be a litigant until about six months after his death.