The Finnish form of Peter was most common in its culture of origin in the 1950s and '60s.

Pekelo is a masculine Hawaiian name with deep cultural significance. In Hawaiian tradition, names often reflect natural elements, family history, or significant events. Pekelo is the Hawaiian form of Peter, which derives from the Greek word "petros" meaning "rock" or "stone." The adaptation follows Hawaiian phonological patterns, where 't' is often replaced with 'k' and 'r' with 'l'. Though not among the most common Hawaiian names, Pekelo represents the important tradition of adapting biblical or international names to Hawaiian linguistic patterns. The name carries both Christian heritage and Hawaiian cultural identity, making it a meaningful choice for families honoring both aspects of their heritage.

For Americans, may prove too much of a twist on Peter.

The Romanian form of Peter, also used in Moldova and Corsica. It appears in the Romanian fairy tale, The Fairy of the Dawn, about a boy named Petru who goes to find a fairy's castle in order to cure his father of an ailment.

Perben is an uncommon masculine name with possible Scandinavian or Dutch origins. It may be a variation of names like Perben, Pärben, or derived from elements meaning 'per' (Peter) and 'ben' (son of). This concise, distinctive name has a strong contemporary sound while potentially carrying historical Nordic roots. Perben remains extremely rare in English-speaking countries but may have regional usage in northern European communities. The name's crisp consonants and clear syllables give it a straightforward, modern quality that works well across cultures. Perben offers simplicity and uniqueness simultaneously, appealing to parents seeking uncommon options that still feel accessible and pronounceable.

Petrousek is a rare masculine name of Slavic origin, particularly found in Czech and Slovak communities. It likely developed as a diminutive form of Peter (Petr), with the suffix '-ousek' indicating 'little Peter' or 'son of Peter.' This patronymic naming pattern is common in Eastern European cultures. Petrousek remains extremely uncommon as a first name, functioning primarily as a surname throughout history. Those bearing this distinctive name might appreciate its direct connection to ancestral heritage and its uniqueness in most Western countries. The name carries the same meaning as Peter — 'rock' or 'stone' — symbolizing steadfastness and reliability, with the added charm of its diminutive form.