> Would you say that Ada sits close to Modula 2 philosophically

In the Rationale for the Design of the Ada Programming Language (published as SIGPLAN Notices, June 1979), the design team explicitly lists their influences. Mesa (a language developed at Xerox PARC, where Wirth made his sabbaticals) is cited as a source for the module/package concept. Modula (referring to Modula-1, 1977) is cited in the context of concurrency and low-level hardware access (e.g., handling interrupts, device drivers), and for the general concept of the module as a syntactic unit. From the timeline we can assume that Modula-2 had not arrived at the design team when they released their proposal to the DoD. Notably, Wirth had actually submitted his own proposal to the DoD (the "Yellow" language, via SRI in 1977), though he withdrew it early because he felt the requirements were too complex. Unfortunately, no public specification of the "Yellow" language exists, but it was very likely not Modula-2.