Syksey
His pseudonym may have been derived from Bill Sikes , the sidekick of gang leader Fagin from Oliver Twist . 
<triplet> Bill Sikes <subj> Oliver Twist <obj> present in work <triplet> Fagin <subj> Oliver Twist <obj> present in work <triplet> Oliver Twist <subj> Bill Sikes <obj> characters <subj> Fagin <obj> characters