One thing of note in Clay's assessment is the following definition of the word "archangel" from the Greek;

 

archangel - "Archaggelos"

Strong's Number:   743	Browse Lexicon
Original Word Word Origin ajrcavggeloß from (757) and (32)

Phonetic Spelling Parts of Speech ar-khang'-el-os    Noun Masculine

Definition

archangel, or chief of the angels

It is derived from th following.

 

Strong's Number:   757	Browse Lexicon
Original Word Word Origin a[rcw a primary word Transliterated Word TDNT Entry Archo 1:478,81 Phonetic Spelling Parts of Speech ar'-kho    Verb
Definition
to be chief, to lead, to rule

And:

 

Strong's Number:   32	Browse Lexicon
Original Word Word Origin a[ggeloß from aggello [probably derived from (71), cf (34)] (to bring tidings) Transliterated Word TDNT Entry Aggelos 1:74,12 Phonetic Spelling Parts of Speech ang'-el-os    Noun Masculine
Definition
a messenger, envoy, one who is sent, an angel, a messenger from God

So it looks from definition that there is but one "Archangel" and that is Michael, the "chief" of all angels, or "messengers from God."

 

Just an observation.

 

YBIC,

 

Michael