Tetsuo is a unisex Japanese given name derived from the characters те (te) meaning 'to put' or 'place', and 翔 (shō) meaning 'soar'. The name can be written in various ways, including теつお, てつを, and てつお. Tetsuo is also used as a surname. It holds cultural significance in Japan, where it's been traditionally associated with the concepts of growth, development, and aspirations.
"Tetsuo was quite popular among parents during the early to mid-20th century, with a peak of popularity between 1921 and 1924, but its prevalence decreased significantly after 1935."