I am Hilary Derby, a professional genealogist now living in Virginia. I was married to Mark Evan (Moishe Isur) KIKEN, Ph.D of Denver, CO for eight years and did a pedigree for him. His father is Jonas (Yonah) Kiken, m. to Thelma(Tova) Coopersmith (deceased). Jonas' father was Morris (Moyshe) Kiken, m. to Fanny (Fay) Foreman. Morris Kiken's father was Yonah (Yonia) Kiken m. to Annie Weisberg, etc.
Your David Dave (Dawid) KIKEN was a son of Yonah (Yoina) KIKEN.
I haven't worked on this family for six years but will be happy to share what I have with you.
Hilary G. Derby, Ph.D.