The Collaborative International Dictionary of English v.0.48:
Willsome \Will"some\, a. [Written also wilsome.] 1. Willful; obstinate. [Obs.] [1913 Webster] 2. Fat; indolent. [Prov. Eng.] --Halliwell. [1913 Webster] 3. Doubtful; uncertain. [Prov. Eng.] --Halliwell. [1913 Webster] -- Will"some*ness, n. [Obs.] [1913 Webster]