Cable One Inc. is getting a new name. The Phoenix-based broadband communications provider said it will rebrand as Sparklight in summer 2019. One of the country’s 10 largest cable companies, Cable One (NYSE: CABO) is coming off another solid three months of growth during the third quarter, with continued subscriber gains and expanded capacity, though it did miss analysts' earnings expectations. “Over the past several years we have evolved and our new brand will better convey who we are and what…