The Baby Englishmen do not have middle names, as a rule. Middle names are in general found only in Europe, especially in Germany and Spain, until the 17th century. The 2nd earl of Bedford's stepdaughter, born abroad. Anthony Maria Browne Lord Montague's grandson, 5th in an unbroken sequence of Anthony Brownes, and born in the lifetime of both his father and grandfather. Perhaps given in honor of his aunt, Mary Countess of Southampton.
Nobles sometimes use nicknames, but generally with intimates, children, or servants.
James is common only in Scotland until the end of Elizabeth's reign. Mary and Margaret often seem interchangeable in parish records. Bridget is not considered particularly Irish, but is a fairly common English girl's name. Rather than waste a name, when a child dies, the next child may be given the same one.