Worldwide, Castree (Castree 
) is an extremely rare feminine first name. Much more frequently, Castree is the last name as well as the forename.
Mr, Leah, Lucy, Jane, Josh, John, Jean, Judy, Jill, Tony, Tina, Nina, Noel, Neil, Emma, Marie, Sarah, Susan, Anita, Aiden, Chris, Colin, Dawn, Craig, Dean, Ruth, Ms, Sam, Sue, Bob, Kim, Kym, Roy, Dan, Joe, Jed, Tom, Ian, Zoe, Mary, Mark, Mike, Sean, Alan, Adam, Carl, Paul, Ryan, and Betty