Halsy \ha(l)-sy\ as a boy's name is a variant of Halsey (Old English), and the meaning of Halsy is "Hal's island". The baby name Halsy sounds like Hallsy and Hallsey. Other similar baby names are Haley, Hal, Hale, Halen, Hayley, Halley, Haily, Hailey, Hali, Halim, Hall, Halle, Hans, Hanss, Haws, Hawley, Hawly, Hays and Kelsy.