Elizabeth Peters is the second born of the two pseudonyms of Barbara Mertz (the other one being Barbara Michaels), under which she has written many mystery/suspense novels. The name originated from her two children, Elizabeth and Peter. They (the books, not the children) are listed here in publication order under each series, but I have not yet found a definitive source for exact publication dates.
The Vicky Bliss series
The Jacqueline Kirby series