All around the world, 源一 (源一 
) is a rare gender-neutral forename. The given name 源一 is habitual in Eastern Asia, particularly China, where it is a very rare unisex name. Much less frequently, 源一 is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| 源一 | China |
|
小河源一 Japanese lawyer (1859-1916), JP (b. 1859) |
|
|
小泉 源一 Japanese botanist (1883-1953), JP (b. 1883) |
|
|
大野源一 Japanese shogi player (1911-1979), JP (b. 1911) |
|
| 大西源一 Japanese historian (1883-1962), JP (b. 1883) |
|
|
| 矢野目源一 Japanese novelist and poet, JP (b. 1896) |
|
|
| 沖森源一 Japanese politician (1899-1951), JP (b. 1899) |
|
|
| 川上 源一 Japanese businessman, JP (b. 1912) |
|
|
| 赤谷源一 JP (b. 1917) |
|