Its meaning soon broadened, however, to mean “range of vision” or “sight” on land or sea. There are six meanings listed in oed's entry for the noun ken, two of which are labelled obsolete See examples of ken used in a sentence.
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An idea beyond one's ken
Range of sight or vision.
In this context, the phrase is infelicitous ' beyond one's ken ', in its ordinary usage, means beyond one's powers of comprehension. Ken is also a masculine given name of scottish / scottish gaelic origin It is used as a given name or as a short form of names with the letters ken (like kenneth, kenan, kendrick, kendall, kennedy, mackenzie, kenson, or kenelm).
Ken in american english (ken) noun a male given name, form of kendall or kenneth Understanding.such a sketch must pass lightly over debatable ground, and must consist largely of suggestions still in need of confirmation But if it serves as a frame into which more precise and more detailed statements may be fitted as they come to the ken of the reader, its object will be attained.
