Cognomen Lamastus (Lamastus 
) , worldwide, is a rare last name. The family name Lamastus is habitual in Panama, where it is quite a rare surname, the United States, where it is a very rare surname, and New Zealand.
| VARIANT | COUNTRY |
|---|---|
| Lamastus | Panama, United States, Canada, Brazil, New Zealand |
Jo, Dana, Dave, Dawn, Gary, Greg, Lara, Leon, Lisa, Luis, Lynn, Jane, Jeff, Tara, Todd, Troy, Tina, Tyra, Neil, Eric, Etha, Opal, Ryan, Kyle, Kent, Cody, Ed, Sue, Bae, Kim, Ron, Lee, Joe, Jim, Eli, Ian, Merle, Quy, Matt, Mack, Mike, Sara, Sean, Alex, Alan, Abby, Adam, Chad, Mary, and Sally