I really like the name
Eileen. My great-grandmother had this same name, so I wouldn't mind using it as an honoring name. Generally, I'm not keen on honoring, but since she is my great-grandmother, I think it's far back enough to use without bringing up confusion at family reunions, for example.
Of the combos, I like:
Eileen CoraEileen Ermengarde (so pretty...)
Eileen HazelEileen MabelEileen Marigold (also really pretty)
Eileen SylviaEileen UrsulaEileen Verity