Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Flanagan, M. T. (2004) "Clare, Richard fitz Gilbert de, second earl of Pembroke (c.1130–1176)" Oxford Dictionary of National Biography Volume 46 Randolph – Rippingille Oxford University Press, page 53