My second GGFather was Robert Lamkin born in Linton, Kent, England in 1848. He was the son of James Lamkin and Jane. I don't know for sure, but according to IGI British Isles there were 8 other Lamkin's born in Linton, Kent about the same time to James and Jane. I suspect these were Robert's brothers and sisters. They were James (1828), Harriet (1831), Jane (1833), William (1836), John (1838), George (1841), Charles (1843), and Eliza (1846).
If any of this matches your tree I would love to hear from you.