What is the feminine form of the masculine form of names in mostly European cultures,  that consists of two main elements: the given name followed by family name that always follow the rules of the Lithuanian language?
Petraitienė
Petraitis
Petraitis is the masculine form of a Lithuanian family name.
 Its feminine forms are: Petraitienė (married woman or widow) and Petraitytė (unmarried woman).
Lithuanian name
A Lithuanian personal name, like in mostly European cultures, consists of two main elements: the given name ("vardas") followed by family name ("pavardė").
 The usage of personal names in Lithuania is generally governed (in addition to personal taste or family custom) by three major factors: civil law, canon law, and tradition.
 Lithuanian names always follow the rules of the Lithuanian language.
 Lithuanian male names, as well as the rest of words, have preserved the Indo-European masculine endings ("-as"; "-is"), although the rules are not as rigid as Latvian names, which preserve masculine/feminine endings even for foreign names.
Gender neutrality in Spanish and Portuguese
Spanish (Sp.)
 has gendered nouns of masculine or feminine gender - with some neuter gender.
 In Spanish, feminine nouns often end in "-a" while masculine nouns often end in "-o".
 As in other Romance languages, masculine form of nouns and pronouns are generally used to refer to a group of both males and females, or to someone of unknown gender.
 Advocates of gender-neutral language modification consider this to be sexist and favor new ways of writing and speaking.
 Activists against sexism in language are also concerned about words where the feminine form has a different (usually less prestigious) meaning. Tatar name
A Tatar personal name, being strongly influenced by Russian tradition, consists of two main elements: isem (given name) and familia (family name), and also patronymic.
 Given name was traditional for Tatars for centuries, family name appeared in the end of the 19th century, when it replaced patronymic.
 In fact, usage of family name appeared when Russian scribers gave documents to Tatars.
 Later, being adapted to Soviet tradition, Tatars started to use patronymic as third element, especially in informal communication. Angus (given name)
Angus is a masculine given name in English.
 It is an Anglicised form of the Irish and Scottish Gaelic "Aonghas", which is composed of Celtic elements meaning "one", and "choice".
 A variant spelling of the Scottish Gaelic name is "Aonghus".
 The Irish form of the Scottish Gaelic name is "Aengus".
 A pet form of the given name "Angus" is "Angie", pronounced ""an-ghee"", which represents the Scottish Gaelic "Angaidh".
 A short form of the given name "Angus" is "Gus", which may be lengthened to "Gussie".
 The feminine form of "Angus" is "Angusina". Sietske
Sietske, pron.
 [ˈsitskə], is a West Frisian feminine given name.
 The form 'Sietske', though it is prevalent, is actually the Dutch spelling of this name; the correct West Frisian spelling is Sytske (In West Frisian, 'Sietske' would be pronounced [ˈsi.ətskə]).
 Although traditional West Frisian given names are less and less popular, Sietske is still a very common girls' name in the province of Friesland.
 Sietske is the feminine form of the masculine given name Sietse (Sytse), formed by dropping the voiceless final syllable and adding a diminutive suffix in its place (in this case "-ke").
 Outside of Friesland, where no Frisian is spoken, this convention is not well known.
 Therefore, the greater part of the Sietskes from provinces other than Friesland are wrongfully addressed as "Sir" in written correspondence.
 Sietske and Sietse are both based on the stem "Siet" ("Syt").
 According to onomatologist Rienk de Haan, "Siet" is a reduced form of Germanic names starting with "Sigi-" (meaning "victory"), or possibly starting with "Sith-" (meaning "companion").
 It is also possible that it derives from Old Frisian "side" (meaning "morale"). Ronald
Ronald ( ) is a masculine given name derived from the Old Norse "Rögnvaldr".
 In some cases "Ronald" is an Anglicised form of the Gaelic "Raghnall", a name likewise derived from "Rögnvaldr".
 The latter name is composed of the Old Norse elements "regin" ("advice", "decision") and "valdr" ("ruler").
 "Ronald" was originally used in England and Scotland, where Scandinavian influences were once substantial, although now the name is common throughout the English-speaking world.
 A short form of "Ronald" is "Ron".
 Pet forms of "Ronald" include "Roni", and "Ronnie".
 A feminine form of "Ronald" is "Ronalda". "
Rhona", a modern name apparently only dating back to the late nineteenth century, may have originated as a feminine form of "Ronald".
 The names "Renaud"/"Renault" and "Reynold"/"Reinhold" are cognates from French and German, respectively. Mira (given name)
Mira is a feminine given name with varying meanings.
 Mira or mera surname or family title Sylheti speaking muslim community in Sylhet Division of Bangladesh  & Barak Valley of Assam .
 In the Romance languages, it is related to the Latin words for "wonder" and "wonderful."
 In the various Slavic languages, it means "peace" and is often used as part of a longer name, such as Miroslava (masculine form: Miroslav) or Sławomira (masculine form: Sławomir).
 In Albanian language, it means "goodness" or "kindness".
 In Sanskrit, it means "ocean", "sea", "limit" or "boundary" In Hebrew, it is a derivative of Miriam or the female equivalent of Meir, meaning light. Latvian name
Latvian names, like in most European cultures, consist of two main elements: the given name ("vārds") followed by family name ("uzvārds").
 During the Soviet occupation (1940 - 1991) the practice of giving a middle name was discouraged, but since the restoration of Independence Latvian legislation again allows giving of up to two given names and it has become more common to give a middle name to children. Albanian name
Albanian names are names used in, or originating in, Albania, Kosovo, Macedonia and the Albanian diaspora.
 In Albania a complete name usually consists of a given name (Albanian: "emri" ); the given name of the individual's father (Albanian: "atësia" ), which is seldom included except in official documents; and a (most commonly patrilineal) family name or surname (Albanian: "mbiemri" ).
 They are invariably given in the Western name order, or given name followed by family name.