Can i Summon with Hannah if playing against Molly or Sandeep

[Phusck]

If I play against Sandeep and he has his upgrade to summon minions

Or versus Molly, and just use her "The one left behind ability"

[Dogmantra]

No. Actions that summon are considered to list a model by name, and therefore cannot be used by Hannah via Make a New Entry because she can only copy actions that do not list a model by name.

From the FAQ (the second part of the question is relevant):

69) If a model has an Action or Ability which can copy an Action on another model but has a stipulation that the copied Action may not list any models by name (such as Just Like You! on the Malifaux Child), does that include Conditions contained within the copied Action which list a model by name (such as Protection of Metal on the Metal Gamin)? Also, can Actions be copied which force the player to name a specific model but do not list one? (For example, Nicodem’s Re-animator Action says to “name a Resurrectionist Minion Undead model,” but does not actually list one by name.) Actions such as Just Like You! which copy other Actions which do not list a model by name may not take either sort of Action. Conditions which are part of an Action’s text are considered to be a part of the Action for this purpose, so it does not matter where the model is listed by name. In the case of Actions such as Re-animator, naming a model is a part of the Action, so it again breaks the “may not list a model by name” restriction.

[Phusck]

Thank you, that clears things up.