Juliana de Tregoz (de Cantilupe) - Would someone explain what this means?

I don't understand the "5's" in the second section. Is he stating they are children of #5 in the first section? - Dal;e)

https://groups.google.com/g/soc.history.medieval/c/WgmTUD7Dly8/m/7Y...
Douglas Richardson
Dec 5, 2010, 5:28:56 PM
to Dear Newsgroup ~
CANTELOWE FAMILY

1. WILLIAM DE CANTELOWE, d. before 1201, married _____.
2. WALTER DE CANTELOWE, living 1216, married AMICE _____.
3. WILLIAM DE CANTELOWE, d. 1239, married MASCELINE (or
MAZRA) DE BRACY.
4. WILLIAM DE CANTELOWE, Knt., d. 1251, m. (1) c.1215/6
MILICENT DE GOURNAY; (2) after 1232 MAUD FITZ GEOFFREY, d. 1261.
5 (by1). WILLIAM DE CANTELOWE, Knt.,d. 1254, m. bef.
1241 EVE DE BREWES.
6. GEORGE DE CANTELOWE, b. 1252, d. 1273, m.
MARGARET DE LACY.
6. MILICENT DE CANTELOWE, m. (1) bef. 1254 JOHN
DE MOHAUT; (2) EUDES LA ZOUCHE, Knt., of Harringworth,
Northamptonshire.
6. JOAN DE CANTELOWE, d.c. 1271, m. HENRY DE
HASTINGS, Knt.

5 (by1). JOHN DE CANTELOWE.
5 (by1). NICHOLAS DE CANTELOWE.
5 (by1). [MASTER] THOMAS DE CANTELOWE, Archdeacon of Stafford, Bishop of Hereford, d. 1282.
5 (by1). [MASTER] HUGH DE CANTELOWE, Archdeacon of Gloucester, Treasurer of Salisbury, liv. 1270.
5 (by1). AGNES DE CANTELOWE, married ROBERT DE SAINT JOHN, of Basing, Hampshire.
5 (by1). JULIANE DE CANTELOWE, married ROBERT DE TREGOZ, of Ewyas Harold, Herefordshire.