There are 11 mathematicians whose last name begin with JOI.
| Joia, Ivo | University of Cambridge | 1993 |
| Joice Nirmala, R. | Bharathiar University | 2016 |
| Joichi, James | University of Illinois at Urbana-Champaign | 1959 |
| Joiner, Brian | Rutgers University, New Brunswick | 1968 |
| Joiner, Jay | University of Minnesota - Twin Cities | 1994 |
| Joiner, II, Harry | Florida State University | 1968 |
| Joiner, Jr., Charles | University of California, Santa Barbara | 1970 |
| Joiron, Céline | ||
| Joita, Cezar | State University of New York at Buffalo | 2000 |
| Joita, Daniela | State University of New York at Buffalo | 2002 |
| Joiţa, Maria | University of Bucharest | 1998 |