Arms of John de Lacy, Earl of Lincoln 1232-1240 (c. 1192-1240) and Margaret de Quincy, Countess of Lincoln 1232-1266, suo jure 1240-1266 (c. 1206-1266)
From p114 of Lacies Nobilitie by Sir John Ferne (1586)
Blazon: Per pale baron and femme I per quarterly i and iv per quarterly or and gules a bend sable and a label of three points argent (Lacy), ii and iii or a lion rampant purpre (Nigold/Neale), II per quarterly i gules seven mascles conjoined or 3, 3, and 1 (Quincy), ii per pale azure three garbs or (Chester) and azure a wolf’s head erased argent (d’Avranches), iii gules a cinquefoil ermine (Beaumont), iv gules a pale or (Grandmesnil)
You may recognize the baron’s arms as those of Roger de Lacy, Baron of Halton and Pontefract; John was his eldest son. They were jointly created Countess and Earl of Lincoln in 1232. The grant was mostly due to Margaret, as the title had previously been held by her mother Hawise of Chester. Thus, John was only Earl of Lincoln by right of his wife, and when he died in 1240, she retained her title in her own right.