When young, Letitia was close to her younger brother, Whittington Henry, born 1804. Paying for university education for him, at Worcester College, Oxford, was one of the reasons that brought Letitia to publish. She also supported his preferment and later dedicated her poem "Captain Cook" to their childhood days together. Whittington went on to become a minister and published a book of sermons in 1835. Rather than showing appreciation for his sister's assistance, he spread false rumours about her marriage and death. Letitia also had a younger sister, Elizabeth Jane (born 1806), who was a frail child and died in 1819, aged just 13. Little is known of Elizabeth but her death may well have left a profound impression on Letitia and it could be Elizabeth who is referred to in the poem "The Forgotten One" ("I have no early flowers to fling").