Carrier argues that a mere Christian brother named James was confused with a carnal brother of Jesus.
There would be another case where a very similar confusion happened:
Mark 7:24-29
24 Jesus left that place and went to the vicinity of Tyre. He entered a house and did not want anyone to know it; yet he could not keep his presence secret. 25 In fact, as soon as she heard about him, a woman whose little daughter was possessed by an impure spirit came and fell at his feet. 26 The woman was a Greek (Ἑλληνίς) born in Syrian Phoenicia. She begged Jesus to drive the demon out of her daughter.
27 “First let the children eat all they want,” he told her, “for it is not right to take the children’s bread and toss it to the dogs.”
28 “Lord,” she replied, “even the dogs under the table eat the children’s crumbs.”
29 Then he told her, “For such a reply, you may go; the demon has left your daughter.”
27 “First let the children eat all they want,” he told her, “for it is not right to take the children’s bread and toss it to the dogs.”
28 “Lord,” she replied, “even the dogs under the table eat the children’s crumbs.”
29 Then he told her, “For such a reply, you may go; the demon has left your daughter.”
The episode is Judaizing in nature (probably not even of pauline origin if "Mark" is taken for a pauline). But it was interpreted by the adorers of Simon Magus as referring to their man-god.
Ἑλληνίς became Helen, a prostitute of a bordel in Tyre.
The "dogs" were the Archons who besieged her in that bordel.
So the miracle occurred again that a mere Greek (Ἑλληνίς) woman was transformed in a woman named Helen.
Just as a mere Christian brother named James was transformed in THE brother of Jesus called Christ.