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New and existing CORAVEL, UBVJHK sub(S), HST, HIP/Tycho, ARO, KPNO, and DAO observations imply that the fundamental Cepheid calibrator [zeta] Gem is a cluster member. The following parameters were inferred for [zeta] Gem from cluster membership and are tied to new spectral classifications (DAO) established for 26 nearby stars (e.g., HD53588/B7.5IV, HD54692/B9.5IV): E sub(B-V) = 0.02+ or -0.02, log [tau] = 7.85+ or -0.15, and d = 355+ or -15 pc. The mean distance to [zeta] Gem from cluster membership and six recent estimates (e.g., IRSB) is d = 363 + or - 9([sigma] sub(x)) + or - 26([sigma]) pc. The results presented here support the color-excess and HST parallax derived for the Cepheid by Benedict et al. Forthcoming precise proper motions (DASCH) and Chandra/XMM-Newton observations of the broader field may be employed to identify cluster members, bolster the cluster's existence, and provide stronger constraints on the Cepheid's fundamental parameters.