Around the world, Shigenaga (Shigenaga 
) is an extremely rare unknown gender forename. Very seldom, Shigenaga is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Shigenaga | Argentina, United States, Japan, Peru, Brazil |
| nejime shigenaga samurai (b. 1536) |
|
|
| matsudaira shigenaga (b. 1574) |
|
|
| andō shigenaga (b. 1600) |
|
|
| nejime shigenaga (b. 1622) |
|
|
| shigenaga tomioka |
|