Why is ComplexQ not available?

For names = Names["System`*"]; executing the following returns 200 hits.

(StringCases[names, ___ ~~ "Q" ~~ EndOfString] //     Flatten /. {} -> Nothing) // Length 

(*200) A sample is presented below.

{"AcyclicGraphQ", "AlgebraicIntegerQ", "AlgebraicUnitQ", \ "AntihermitianMatrixQ", "AntisymmetricMatrixQ", "ArgumentCountQ", \ "ArrayQ", "AskedQ", "AssociationQ", "AtomQ", "AudioInstanceQ", \ "AudioQ", "BinaryImageQ", "BioSequenceQ", "BipartiteGraphQ", "BondQ", \ "BooleanQ", "BoundaryMeshRegionQ", "BoundedRegionQ", "BusinessDayQ"} 

Question

For what reason is ComplexQ missing from this list of queries?