I found what is probably August's passenger manifest:
Boston Passenger and Crew Lists, 1820-1943
Name: August Ganbis [probably GaUbis]
Arrival Date: 22 Apr 1907
Age: 26
Estimated Birth Year: abt 1881
Gender: Male
Ethnic Background: Lithuanian
Port of Departure: Liverpool, England [lived there 1/2 year, arrived from Hamburg in Grimsby in 1906 from Libau]
Ship Name: Cymric
Port of Arrival: Boston, Massachusetts
Friend's Name: Domenic Ravisky
Last Residence: Russia
It was not uncommon for emigrants to stop in England or Scotland, work for some more money and then take a different ship to the U.S.
Here is his WWI draft registration:
World War I Draft Registration Cards, 1917-1918
Name: August Gaubis
City: Detroit
County: Wayne
State: Michigan
Birth Date: 25 Jul 1879
Race: White
FHL Roll Number: 2024026
DraftBoard: 6
His wife is listed as Amelia. Unfortunately, the form does not have a place of birth.
The following is probably the family's 1920 U.S. Census entry:
1920 United States Federal Census
Name: Amelia Agaubis
[Amelia Agantis]
Age: 36
Birth Year: abt 1884
Birthplace: Russia
Home in 1920: Detroit Ward 5, Wayne, Michigan
Race: White
Gender: Female
Immigration Year: 1907
Relation to Head of House: Wife
Marital Status: Married
Spouse's Name: August Agaubis
Father's Birthplace: Russia
Mother's Birthplace: Russia
Able to read: Yes
Able to Write: Yes
Neighbors:
Household Members:
Name Age
August Agaubis 40 [Agaubis is how it is written by the census taker]
Amelia Agaubis 36
Philip Agaubis 7 [probably Felix]
Eddie Agaubis 5
Helena Agaubis 2
Most everything in the record matches known information about the family.
What is the source for the birth places of "Illdly" and Markeneke? Lithuanian does not use double letters like "-ll-". Markeneke might be Marcinkonys in the Varena district in the south of Lithuania near the border with Belarus. It would be pronounced mar-tsihn-KOH-nees.