Source for 1-15: Burke's General Armory
1) (Earl Cowper). Ar. three martlets gu. on a chief engr. of the last, three annulets or. Crest—A lion's garb erect and erased or, holding a cherry branch vert fructed gu. Supporters— On each side a light dun horse with a large blaze down the face, mane close shorn, except a tuft upon the withers, a black list down the back, a bob tail, three white feet, viz., the hind-feett and near fore-foot. Motto—Tuum est.
2) (Baroness Lucas) (William Cowper, the Poet, grandson of Spencer Cowper, a Judge of the Common Pleas, brother of the 1st Earl Cowper) Quarterly, 1st and 4th, De Grey, barry of six ar. and az.; 2nd and 3rd, Robinson, vert a chev. betw. three stags at gaze or. Supporters—On either side a wyvern with wings erect or.
3) Or, a saltire gu. over all a fesse sa.
4) (London). Az. a saltire betw. four trefoils slipped or, oa a chief of the last three dolphins embowed of the first.
5) (co. Salop). Az. a saltire engr. betw. four trefoils slipped or, on a chief ar. three dolphins embowed of the first a bordure engr. gu. Crest—A lion's head ar. erased gu. gorged with a chaplet of laurel vert.
6) (Carleton Hall, and Unthank, Cumberland). Az. a chev. paly or and erm. in chief an annulet betw. two martlets ar. in base a caduceus of the second. Crest—A buffalo's head erased per fess sa. and or, Arms
7) (co. Gloucester). Sa. on a chev. betw. three goats’ heads couped ar. three pellets. Crest—An Arms
8) (Sir Richard Cowper, Knt., of Temple Elfont, co. Surrey, nephew of John Cowper, serjeant-at-law. Visit. London, 1568). (Arthingworth, co. Northants, Shukbrough, co. Warwick, and Lubbenham, co. Leicester. Visit. Leicester, 1629). Ar. on a bend engr. betw. two lions ramp. sa. three plates. Crest—A lion ramp. sa. holding paleways a tilting spear ar.
9) (London). Az. on a bend ar. betw. two pelicans or, three ogresses. Crest—A bull’s head erased or, billettee sa. horned ar. betw. two wings expanded az.
10) or Cooper - Gu. on a chev. betw. three lions pass. guard. ar. as many mascles of the field. Crest—A lion sejant ar. holding a battle-axe of the same.
11) (Overleigh, co. Chester; granted 1642). Az. on a bend engr. or, betw. two wolves’ heads ar. three crosses crosslet gu. Ancient Arms
12) (Sussex, 1614). Quarterly, ar. and gu. in the second and third quarters a pheon of the first. Crest—A pheon ar. point upward betw. two wings gu.
13) (Bolton-upon-Swale, co. York). Gu. a bend erm. (another, vair) betw. six lions ramp. or. Crest—On a castle gu. a Saracen king’s head ppr. wreathed about the temples ar. and az. and crowned with a Saxon coronet or.
14) Ar. a chev. sa. on a chief of the second, three leopards’ heads or.
15) Az. on a chev. engr. ar. betw. three cinquefoils erm. two lions combatant sa.