Algirdas

Meaning: Basically has the (more or less) figurative meaning of "he who hears everything", derived from Lithuanian al meaning "everything, every last one" combined with the Lithuanian noun girdas meaning "rumour", which is ultimately derived from the Lithuanian verb girdėti meaning "to hear". Also compare the related Lithuanian noun gandas meaning "rumour, hearsay". This name was most notably borne by a 14th-century Grand Duke of Lithuania. Other Lithuanian bearers of the name include the former president Algirdas Brazauskas (1932-2010) and the former prime minister Algirdas Butkevičius (b. 1958).

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Notes: - https://en.wikipedia.org/wiki/Algirdas_(name) (in English)
- https://lt.wikipedia.org/wiki/Algirdas_(vardas) (in Lithuanian)
- https://www.tevu-darzelis.lt/vaiku-vardai/Algirdas/ (in Lithuanian)
- http://www.vardai.org/vardo-reiksme/Algirdas/ (in Lithuanian)
- http://vardai.vlkk.lt/vardas/Algirdas (in Lithuanian)
- https://translate.google.com/#lt/en/girdas (in English)
- https://en.wiktionary.org/wiki/gird%C4%97ti (in English)
- https://translate.google.com/#lt/en/gird%C4%97ti (in English)
- https://translate.google.com/#lt/en/gandas (in English)
- https://www.linkedin.com/pub/dir/?first=Algirdas&last=&search=Zoeken
- https://en.wikipedia.org/wiki/Algirdas (in English)
- https://en.wikipedia.org/wiki/Algirdas_Brazauskas (in English)
- https://en.wikipedia.org/wiki/Algirdas_Butkevi%C4%8Dius (in English)

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(Information from name #31041 originally submitted by an anonymous user).

I am sorry to disagree with the previous user. This explanation of the name is a myth created by Lietuvan historians in the beginning of XXth century. Such variation of the name of the Grand Duke is unknown to the historical sources from Grand Duchy of Lithuania and is only present in Greek sources, where forms of names with -(o)s in the end are common.

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Grand Duke had a stamp with his name written as "ОЛГЕР" ("OLGER"), which resembles Cyrillic "Olga/Oleg" and therefore could be a derivate from Norse "Helge". There is also a version that it has to do with Old German "-ger-" meaning "spear".

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Stamp: https://commons.wikimedia.org/wiki/File:Algierd._%D0%90%D0%BB%D1%8C%D0%B3%D0%B5%D1%80%D0%B4_(XIV).jpg