Seems I "got lucky" this time around. Here are some of the data points you asked about:
Marriages of the children of Hugh Queen and Margaret Jane White:
Charles Frederick Queen m. Lottie May Kearns, 24-Jun-1903, at St. John, NB.
Maude E. Queen m. Newall J. Matthews, 16-Sep-1911, Portland, ME Maude had been previously married to a Mr. ?Beeler?, who had died (she was widowed by 1911. 1911 record shows as her 2nd marriage, his first. He was 44, she was 36. The common POB for most of these children of Hugh and Margaret appears to be Welsford. Newall Matthews was b. Boothbay, ME.Newall was s/o Thomas Matthews and Sarah Jane McCobb (they were m. 21-Jan-1844, Boothbay, Lincoln Co, ME)
Edith Beatrice Queen m. Robert Thomas Belyea, 13-Aug-1895, St John Co, NB (paper says 15th, certificate says 13th)
Mabel M. Queen m. Wilbur (Wilber) G. Leavitt, 22-Dec-1909, Portland, ME. He was b. Phillips, ME, s/o Seth B. Leavitt and Martha Walker. Though he was 39 and she was 31, it was the first marriage for both.
Walter Cecil Queen, d. 20-Jul-1956, St. John City. He was b. Petersville, 26-May-1879, s/o Hugh Queen and Margaret J. White, and as you said, probably never married as he was listed as single on his death record.
James William Queen m. Carrie J. Scott, 06-Jul-1892, Portland, Cumberland, ME. She was d/o John Scott and Margaret Quinn, aged 23.
Phoebe appares to have married an Alfred Mall or Nall McCracken, 07-Nov-1900, at Portland, ME, had two sons who died young, in 1901 and 1905. On marriage record, Marriage certicate does show father as Hugh Queen and mother as Margaret J. White. Alfred's parents listed as John McCracken and Matilda Reed.
Joseph E. Queen (likely same) b. 07-Mar-1870, was naturalized in Maine in 1898. He married 03-Jul-1893, to Mary Ettinger, who died prior to 1930 census. They had at least two children, Florence V. Queen, b. Oct-1895, and Grace L. Queen, b. Feb-1898, both in ME. Their mother, Mary, was b. Canada May-1867. Joseph apparently died in 1945 in Maine (prob. in or near Portland). Without information from that record, it's hard to be SURE he was son of Hugh and Margaret, but there's a pretty good chance he was. No idea what Mary's maiden name was...
Found an Ancestry tree that confirms marriage was 03-Jul-1893, ME, to Mary Ettinger. There was, apparently, a son, also born to this couple in 1910, but died same.
Margaret J. (WHITE) Queen, d. 03-May-1891, Armstrong's Corner, Petersville, left husband and 8 children.
Per Ancestry tree for WestoverWoman, the fourteen children of James Queen and Jane Woods were:
Francis (male) 1839-1887
Margaret Ann 1842-1916
Charles L. 1844-1918
Caroline J. 1848-1934
Thomas James, 1851-193?
John Wesley 1854-1934
Amelia or Amehlia 1857-1942
Mary Ellen 1858-194?
Elsworth (male) 1865-194?