Definition of "Jessamy"

Jessamy’s eyes widened. What was it Matchett had said? That she would not take sauce from Jessamy because she was ‘only the housekeeper’s niece and the cook-housekeeper at that?’

1967, Barbara Sleigh, Jessamy, Sevenoaks, Kent: Bloomsbury, published 1993, page 32

‘Aunt Maggie, why was I ever called Jessamy?’ And as she said it she wondered why she had never thought to ask before. Her aunt changed the heavy suitcase to the other hand and said, ‘It was your mother’s name.’ Jessamy’s heart gave a little jump inside her, and Aunt Maggie went on: ‘When I said I thought it was too fly-away, and wouldn’t Ann or Mary be more sensible, she said that the eldest daughter was always called Jessamy in her family.’

1967, Barbara Sleigh, Jessamy, Sevenoaks, Kent: Bloomsbury, published 1993, page 146