John IV LE STRANGE, 1st. Baron Strange Of Knockin) 
- Born: Abt 1254, Chesawardine, Shropshire, England
- Marriage: Joan DE SOMERY 
- Died: 26 Feb 1275, Knockyn, Warwickshire, England about age 21
Sources, Comments and Notes:
Source <http://www.tudorplace.com.ar/STRANGE.htm#John Le STRANGE (1º B. Strange of Knockin)>:
"John Le STRANGE (1º B. Strange of Knockin) Born: ABT 1226, Chesawardine, Shropshire, England. Died: 26 Feb 1275/6, Knockyn, Warwick, England
Father: John Le STRANGE
Mother: Lucy De TREGOZ
Married: Joan De SOMERY (b. ABT 1233 - d. 1282) (dau. of Roger De Somery and Nicole D'Aubigny ABT 1252, Ellesmere, Shropshire, England
1. John Le STRANGE (2º B. Strange of Knockin)
2. Hawise Le STRANGE
3. Margaret Le STRANGE"
"JOHN [III] le Strange (-before 26 Mar 1269). ... m LUCY, daughter of ---. John [III] & his wife had four children: ...
a) JOHN [IV] le Strange (-before 28 Dec 1275). A writ dated 26 Feb "4 Edw I", following the death of "John L´Estrange alias Le Estraunge" names "John his son believed to be 22 and more is his next heir...aged 28".
m JOAN de Somery, daughter of ROGER [IV] de Somery & his first wife Nicole de Albini of the Earls of Arundel. The Annales Londonienses name "filium Radulphum qui mortuus erat ante patrem suum et quatuor filias, Margaretam, Johannam, Elizabetham et Matildam, Margareta nupsit Radulpho de Basset juniori, Johanna nupsit Johanni Lestrange, Elizabetha Waltero de Souli, Matillda Henrico de Erdyntoune" as the children of "Rogeri de Someri" and his wife "Nicholaa", adding that Joan married "Johanni Lestrange". A writ dated 26 Aug "1 Edw I", after the death of "Roger de Somery" records details of "the inheritance of Nicholaa de Albiniaco his first wife" and names "Margaret the wife of Ralph de Cromwelle, Joan the wife of John le Strange, Mabel the wife of Walter de Suyllye and Maud the wife of Henry de Erdinton" as her heirs. John [IV] & his wife had one child:
i) JOHN [V] le Strange ([1252/53]-8 Aug 1309 or before). ..."
I. ROLAND LE STRANGE, circa 1112
II. JOHN LE STRANGE (I), circa 1135-1178
III. JOHN LE STRANGE (II), 1178-1234
IV. JOHN LE STRANGE (III), 1234-1269
V. JOHN LE STRANGE (IV), 1269-1275 [!!!]
VI. JOHN LE STRANGE (V), 1275-1309
VII. JOHN LE STRANGE (VI), 1309-1317
VIII. STRANGE OF BLACKMERE, 1309-1616 ..."
John married Joan DE SOMERY  [MRIN: 1698], daughter of Roger IV DE SOMERY, Lord of Dudley  and Nicole D'AUBIGNY . (Joan DE SOMERY  was born about 1255 in , , England and died in 1282 in , , England.)