mjnb4x on Family Tree Circles

EUDORA TRASK, daughter of ELBRIDGE and HANNAH ABELL TRASK, wed WILLIAM MARTIN SUMMERS, SR. Their son, WILLIAM MARTIN SUMMERS, JR. wed MINNIE ELIZABETH ROSS in 1892. One of their sons, ELMO MARTIN SUMMERS wed THELMA MERLE POOLER 1924. One of their sons, DEAN MARTIN SUMMERS wed ORA AMARYLIS DEATHERAGE-CURTIS in 1948. Their second son, ROBERT LON SUMMERS married me 1977.

We have located the following headstones in Oregon: DEAN, ELMO, THELMA, WILLIAM JR., WILLIAM SR., EUDORA & ELBRIDGE. HANNAH is said to be in the Old Empire Cemetery in what is now North Bend, Oregon...just north of Coos Bay. Sadly, the land was given to the local Indian tribes years ago with the written stipulation that they must keep it up & in good repair. They have ignored that and let it go to ruin, fencing it off and padlocked so that nobody can get in. Several of the resting places have slipped into the sea due to storms and ZERO upkeep of the grounds.

My mother-in-law's maiden name was DEATHERAGE. Her full name was: ORA AMARYLIS "ANN" DEATHERAGE.

She was married 4 times:TED CURTIS (DATES UNKNOWN); DEAN SUMMERS (1948-1970), LESTER PEDERSON (UNKNOWN); LLOYD WENDELL HECKATHORN, JR. (1972-1992:HER DEATH).
Attached photo of her headstone at Canyon Hill Cemetery in Caldwell, Idaho.

I have known about my older, illegitimate half-sister, Dorothy Ann(a) Patterson/Hatch since about 1973/4. Little information given out due to birth circumstances. All I was told was that she was named for deceased paternal aunt Dorothy Anna; mother was named RUTH PATTERSON and said-to-be family friend of Pop's family(HATCH); born in the Seattle/Tacoma/Olympia area sometime between 1950 and 1956...after other half-sister, Toni (same dad) and before Pop met my Mom.
All reliable sources now deceased. ALL I need are the birth/death dates of sis and her mother, please. IF still living, all further contact is left up to my sister as I do NOT wish to cause issues. ALL I want is the basic minimum information my family history records.
ANYONE with even a shred of information is asked to please help! I was unable to get this information before 2 of my 3 other sisters died from cancer.

All SSDI searches have not shown anyone in correct time frame for birth dates and IF ever married, those last names were never revealed to me.

(P.S. Shortly before his death, Pop was just barely able to confirm to me that I did have another older sister named for our Aunt. He tried to tell me more, but couldn't.)