Family name Iwanaga (Iwanaga 
, 岩永 ) , throughout the world, is quite a rare surname. The family name Iwanaga is habitual in Japan, where it is a rare surname, Singapore, and Brazil. In absolute terms, it most frequently occurs in Brazil, Japan, and the United States. Likewise, Iwanaga is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Iwanaga | Peru, Brazil, Japan, United States, China |
| 岩永 | China |
| jan iwanaga JP (b. 1550) |
|
|
| yoshitaka iwanaga researcher |
|
|
| kanako iwanaga researcher |
|
|
| yasuhiro iwanaga researcher |
|
|
| daigo iwanaga researcher |
|
|
| eisaku iwanaga researcher |
|
|
| tomoyuki iwanaga researcher (ORCID 0000-0003-1158-4403) |
|
|
| takuya iwanaga researcher |
|
|
| kenjiro iwanaga researcher |
|
|
| masanobu iwanaga researcher |
|
|
| shiroh iwanaga researcher (ORCID 0000-0002-4394-7267) |
|
|
| midori iwanaga researcher |
|
|
| kougoro iwanaga researcher |
|
|
| joe iwanaga researcher |
|
|
| takashi iwanaga researcher |
|