muckraking United States journalist who exposed bad conditions in mental institutions (1867-1922)
"The seaman's groundbreaking reports on the overcrowding and neglect at state asylums shocked the nation and led to major reforms."
A mariner or sailor, one who mans a ship. Opposed to landman or landsman.
"After years at sea as a seaman, he still felt more comfortable on the deck than in any office back on land."
A surname, from occupations​.
"The census records list Seaman as a family name derived from his grandfather's work on merchant vessels."