'In 1911 was published Annals of the Leonard Family, by Fanny Leonard Koster, an agreeably written book which made no pretense to being a formal genealogy and which obviously was based more on printed sources than an original research. A chart was included in the front pocket of this book, on which the American settlers, James and Henry Leonard, were entered as sons of Thomas and Lydia (White) Leonard, ...'
This (or more likely Koster's sources) might be the origin of the belief that the mother of Henry and James Leonard was named Lydia. There is no evidence for this - her name is given as Elizabeth in baptism records for 3 of her children (and no mother's name is given in the other baptism records that have been found).