Named either after Sefton in Lancashire or, perhaps more likely, after one of the holders of the title Earl of Sefton. Sefton Park is also the name of a public park in Liverpool and a suburb of the city in that vicinity. See also Altcar Court.
Resolved that the name ‘Sefton Park’ be approved for a new street situated off Pim’s Avenue on the property of Mr James Mawhinney. (IC 11th February 1936).