Well "Planetagent" might turn out in 1000 years to be an occupationally-derived surname (as Mason, Baker, etc. often are). Assuming we don't kill ourselves off before then. Maybe the subject tree just had typographical errors of 15th- and 16th-century dates that should have been for 30th-century projections. Could be workings of a novel, as plausible as the nonexistent central Asian names with attributed dates of 2000 years ago that populate so many trees.