Aller

Etymology
From

Etymology
From, from earlier and , of uncertain origin:.
 * From +, meaning "alder water".
 * From the root  common in many other river names, such as the  in Latium,  in some Celtic sites, and the  in Brittany.  See also 🇨🇬, 🇨🇬, 🇨🇬.  More at Aller.