Pentti Aalto was a Finnish linguist who was the University of Helsinki

University of Helsinki

The University of Helsinki is a university located in Helsinki, Finland since 1829, but was founded in the city of Turku in 1640 as The Royal Academy of Turku, at that time part of the Swedish Empire. It is the oldest and largest university in Finland with the widest range of disciplines available...

 Docent

Docent

Docent is a title at some European universities to denote a specific academic appointment within a set structure of academic ranks below professor . Docent is also used at some universities generically for a person who has the right to teach...

 of Comparative Linguistics 1958–1980. Aalto was a student of G. J. Ramstedt.
He defended his doctoral dissertation in 1949 in Helsinki.

Aalto published on the Latin

Latin

Latin is an Italic language originally spoken in Latium and Ancient Rome. It, along with most European languages, is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the Christian clergy speak it fluently, and...

 gerundive

Gerundive

In linguistics, a gerundive is a particular verb form. The term is applied very differently to different languages; depending on the language, gerundives may be verbal adjectives, verbal adverbs, or finite verbs...

, the Latin gerund

Gerund

In linguistics* As applied to English, it refers to the usage of a verb as a noun ....

, the Greek

Greek language

Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...

 infinitive

Infinitive

In grammar, infinitive is the name for certain verb forms that exist in many languages. In the usual description of English, the infinitive of a verb is its basic form with or without the particle to: therefore, do and to do, be and to be, and so on are infinitives...

, the history of the Finnish study of Oriental, classical, and modern languages. He edited Ramstedt's comparative Altaic grammar and completed an edition of the Mongolian

Mongolian language

The Mongolian language is the official language of Mongolia and the best-known member of the Mongolic language family. The number of speakers across all its dialects may be 5.2 million, including the vast majority of the residents of Mongolia and many of the Mongolian residents of the Inner...

 version of the Pan̂carakṣā and a collection of Latin sources of Northeast Asian peoples.