Marta Lapukas

Mother’s name:
Marta [or Morto] Powilaitis, housewife, of Lithuania. (Michael Marriage Record)
Marta Ponitojtis [or Pouitojtis] (John Marriage Record - Maine)
Martha Pouilaitis (John Marriage Record - Massachusetts)
Morta Povilatis (son John Funeral)

Likely Lithuanian given name & married name: Morta Lapukienė or Morta Lapūkienė

Not sure what her birth surname would have been in Lithuanian - Povilaitis ? Povylaitis?

Possible Brother in US: Georg Powilatis of Lewiston ME (Arrival of sons John & Michael 1902)

SOURCES:
son John Marriage - Maine Record: "Maine Vital Records, 1670-1921," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:9398-4DQQ-HT?cc=1803978&wc=... : 20 May 2014), Vital records 1892-1907 > Lapierre-Lavoie > image 611 of 4253; multiple sources, Maine.

son John Marriage - Massachusetts Record: "Massachusetts Marriages, 1695-1910, 1921-1924", database, FamilySearch(https://www.familysearch.org/ark:/61903/1:1:FH7S-3Z5 : 28 July 2021), John Lopukas, 1905.

son John Funeral: “John Lapukas” Lewiston Evening Journal, Lewiston ME, 3 Sep 1940, p 11, https://www.myheritage.com/research/record-10622-967142/lewiston-ev...

son Michael Marriage Record: “Marka Laprikas” in the Maine, U.S., Marriage Records, 1713-1922, https://www.ancestry.com/discoveryui-content/view/1669644:1961

sons John & Michael Arrival 1902: "New York Passenger Arrival Lists (Ellis Island), 1892-1924", database with images, FamilySearch(https://familysearch.org/ark:/61903/1:1:JFL6-7Z9 : 2 March 2021), Jonas Lapuks, 1902.