Surname
Tomonaga
Tomonaga (朝長) is a Japanese surname. Its kanji mean morning + long, and Wikidata lists 13 notable people with this family name.
と · も · な · が · ともなが
What Tomonaga means
朝
morning
長
long, leader
Where the name comes from
The kanji of Tomonaga mean morning + long. Many surnames like it began as descriptions of a family's land, trade or position before surnames were required for every household in 1875.