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