Yaroslav Mar

His Excellency Yaroslav Mar Ярослав Мар יארוסלב מר
1st President of Lostisland
Incumbent
Assumed office  5 April 2013
Prime Minister	Denys Tezdzhanenko (2013), Irina Sopas (2013-2015), Denys Tezdzhanenko (2015-2022), Maria Ostroukhova (2022), Mordechai Linhart (2022 - incumbent)
2nd Administrative-General of the Antarctic Micronational Union
Incumbent
Assumed office  19 September 2014
Preceded by	Nicholas of Flandrensis
1st Captain Regent of Lostisland
In office 1 September 2010 – 5 April 2013
Succeeded by	Office abolished

Yaroslav Mar is a Russian and Israeli musician, travel manager and published author, founder of the Federal Republic of Lostisland. He is also the Administrative-General of the Antarctic Micronational Union since 2014.