Sir Nicholas Harington
Sir Nicholas was born in 1345 in of Hornby Castle.  He died after 1397.

 Isabel English
Isabel was born about 1351 in of Lancaster, England.

 Isabel Harington
Isabel was born about 1364 in Brearley, York, England.

 Sir William Harrington
Sir William was born about 1373 in Hornby, Lancaster, England.  He died on February 22nd, 1440.