Why did Ned Stark adopt Jon Snow?

Ned gave him the name Jon following Lyanna’s death to conceal his real identity from Robert Baratheon as Lyanna believed Robert would kill Jon if he found out he was a Targaryen. To refresh your memory, Ned — alongside Robert — was a ward to Jon Arryn for much of his adolescence and thought of him as a second father.

How is Ned Stark related to Jon Snow?

In A Game of Thrones, Jon Snow is introduced as the 14-year-old illegitimate son of Eddard “Ned” Stark, Lord of Winterfell, and half-brother to Robb, Sansa, Arya, Bran and Rickon. Ned treats Jon as much like his other children as propriety and his honor will allow.

Did Ned Stark know that Catelyn still hated Jon Snow?

After all these years Catelyn still hated Jon Snow. She can’t accept him as a son. It didn’t mean she hadn’t tried but she was just not able to do it (She had conversation with Talisa Stark about how she is not able to accept Jon Snow as her own son) Ned Stark knew that Catelyn hated Jon Snow.

Why didn’t Ned Stark tell Sansa about Jon Snow’s Secret?

Ned doesn’t want to think about the answer to that question, and by not telling her, he’s removed it as one of her options. Jon’s secret is a supremely dangerous one — he threatens not only Robert’s hold on the crown, but also the Lannisters’ power as Baratheon in-laws.

Why didn’t Eddard Stark marry Catelyn Stark?

Because Eddard did not trust Catelyn at the time enough to tell her about a secret that could lead to murder of Jon and destruction of House Stark. Later the topic just never came up and both of them decided not to bring it up and enjoy a loving marital life. Nothing was to be gained except guaranteed security of Jon. Just a precautionary thing.

Why could Ned not trust Catelyn with the secret?

Ned could not trust anyone with the secret as if word would come back to Robert it would likely end with the death of Jon. Early on Catelyn inquired about Jon’s mother based on rumors she was hearing in Winterfell. After Ned denied her, she stopped asking…