U.S. States: North Carolina: Bladen County
There are none under the McClellan spelling. There is one McClalland will for an Andrew McClalland, dated 21 March 1752. It names grandchildren: Thomas, Jane, Andrew, and James McClalland. Executor is Andrew McClalland (son-in-law). Witnesses are George Brown, Benja. Moor, Benj. Fitzrandolph. Clerk was Thos. Robeson. [Don't ask me how this Andrew McClalland was a son-in-law; I don't know; this is from my book of abstracts.]
There is also a will for an Andrew McLelland, dated 26 June 1845, probated November Term 1846. It named son Thomas, grandson Angus McLelland. Executor was Colin Monroe. Witnesses were Rowland Singletary, Snowden Singletary. Clerk was H. H. Robinson.
I would think the first one would be the right family, but it would take further study to decipher the relationships. Perhaps you have enough information that it will fit with what you know already.