Similar Ukrainian and Belarusian names are romanized as Oleksii (Олексій) and Aliaksiej (Аляксей), respectively.
The Russian Orthodox Church uses the Old Church Slavonic version, Alexiy or Aleksiy (Алексiй, or Алексий in modern spelling), for its Saints and hierarchs (most notably, this is the form used for Patriarchs Alexius I and Alexius II).
These may be further transformed into Alyoshka, Alyoshenka, Lyoshka, Lyoha, Lyoshenka (Алёшка, Алёшенька, Лёшка, Лёха, Лёшенька, respectively), sometimes rendered as Alesha/Aleshenka in English.
The form Alyosha may be used as a full first name in Bulgaria (Альоша) and Armenia.
The following surnames derive from Alexey and its various forms: Alexeyevka is a common Russian village name.