三-character carve-up of 'Den-zel':
丹 (dān, 'red/cinnabar') for 'Den-',
泽 (zé, 'marsh/lustre') for '-zel',
尔 (ěr) is the standard suffix for the English consonant-cluster '-l'. The same '-
尔' shows up in
哈尔 (Howl),
比尔 (Bill),
卡尔 (Karl) — train your eye to read it as 'final L'.