Globally, Ostler (Ostler ) is an extremely rare epicene given name. Much more frequently, Ostler is the last name as well as the forename.
Hostler, Osler, and Ослер
Mo, Del, Roz, Roy, Ron, Rob, Ray, Pia, Pam, Pat, Kim, Ken, Bri, Bob, Ben, Cal, Amy, Ami, Ari, Ano, Ann, Ana, Sue, Sam, Max, Ed, Jb, Jo, Ms, Mr, Dee, and Dan
) is an extremely rare epicene given name. Much more frequently, Ostler is the last name as well as the forename.