The Spanish word 'sábalo' (meaning 'shad', a type of fish) comes from Celtic origins. It can be traced back to the Celtic word 'samauca', which literally meant 'summer fish'. This evolved into another Celtic form 'sabalos', still referring to the shad fish, before finally entering Spanish as 'sábalo'. The connection to 'summer fish' in its original form makes sense given that shad are known for their seasonal migrations, often being most abundant during summer months.

There aren't many common Spanish words that share the same Celtic root as 'sábalo', as Celtic borrowings in Spanish are relatively rare compared to those from Latin or Arabic origins.

While English 'shad' (the same type of fish) isn't etymologically related to Spanish 'sábalo', as it comes from a different root, there aren't any common English words that share the Celtic ancestry of 'sábalo'.