Keri Tate is a fictional alias featured in the Halloween film series. It was referenced in the 1998 movie, Halloween H20: Twenty Years Later.
Keri Tate was the alias adopted by Laurie Strode after faking her own death shortly following the Halloween night massacre of 1978 wrought by her brother, Michael Myers, as well as the slaughter at Haddonfield Memorial Hospital. It was her fervent wish that by going through this pseudonym, Michael Myers would not be able to track her down. Its unclear exactly when Laurie adopted this alias, but it was no later than 1981, which is when Laurie gave birth to her son, John, who carried the Tate surname.
Laurie was still going by this name by the late 1990s when she running Hillcrest Academy in Northern California. She eventually told her lover and colleague Will Brennan the truth about her background and real name. Despite all of her precautions, Michael Myers managed to find out that his sister was still alive and tracked her down to Hillcrest.