AphDem11.211:3 :ܒ̈ܢܝ ܩܢܛܘܪܐ܂ ܕܐܦ ܗܢܘܢ ܡܬܚܡܝܢ ܐܢܘܢ܂ ܥܡ ܒ̈ܢܝ ܐܝܫܡܥܝܠ‏ : the sons of Keturah, who are also adjacent to the Ishmaelites
See the entire entry for məṯaḥḥem adj. contiguous