Odine Gunnelle Olsen

From Winn Wiki

Odine Gunnelle Olsen (variously spelled as Odina or Odena), is born in 1874 and is less than three years younger than Nina.  She is Hilda’s mother.  She works in New York City as a cook in a private home.  The identity of Hilda’s father is unknown to Nina, and perhaps also to Hilda.  Based on the private education that Hilda received (boarding school in Waltham, followed by the Lowthorpe School), it is possible that there was financial support coming from Hilda’s father.