Sir John Markham
Sir John was born in 1368 in Sedgebrooke, Lincoln, Eng.

 Elizabeth Cressy   ***
Elizabeth was born in 1378 in Braytoft, Lincoln, Eng.  She died at the age of 30 on September 27th, 1408 in England.

 Sir Robert Markham
Sir Robert was born in 1406 in Sedgebrooke, Lincoln, Eng.