Isabel (Stanley) Legh, of Hooton - Extra children?

Profile notes have:

Robert Legh, esq. of Adlington, wedded, first, Isabella, daughter of John Savage, of Clifton, by whom he had no issue; and, secondly, Isabella, daughter of Sir William Stanley, knt. of Hooton; by whom he had,

i. Robert, his heir.
I. Margaret, m. first, to Thomas Mere, of Mere; and, secondly, to Robert Reddish, of Catteral.
II. Margery, m. to William Davenport, esq. of Bramall.
ill. Isabel, m. first, to Laurence Warren, esq. of Poynton ; and, secondly, to Sir George Holford, of Holford.
iv. Matilda, in. to John Mainwaring, esq. of Peover.
v. Agnes, m. to Sir Andrew Brerelou, of Brereton.
VI. m. to Pigott, esq. of Chetwynd, Salop.

Robert Legh was I. at his decease (inq. p. m. 18 Edward IV.) by his son, Robert Legh, esq. of Adlington

But there are also attached:

Reginald Leigh

John de Legh

Dulcia Legh

Do they belong in this Stanley generation?