I've had quite a bit of correspondence now with the Adlam Hill family, originally of Neath.My GGrandmother Letitia (Hutchfield)Penney had 10 children of which eight survived.The youngest Sally (Sarah?) Penney married Leonard Adlam Hill.
They had 4 children: Cecil Leonard Ernest Frank.
Leonard had two children: Richard and Ieuan Adlam Hill.These are the Adlam Hills that I have been in touch with, along with Gregory 24 a policeman in Penllergaer, near Neath.
We are not certain how "Hill" gott added to the Adlam name, but most likely by marriage, some generations ago.
If you give me a few more details on your Adlams, perhaps I can help you find more information.
I hope this helps you and best of luck. Barry Price firstname.lastname@example.org or email@example.com