You may read here suggestions to create the Magyar faction before the foundation of the Christian kingdom.
I will edit this post from time to time.
Faction Name
The m.gy.r consonants are sure (Arabic source) but the vowels were surely different than in the word Magyar. The first written Latin sources in the 13th century used the Moger (=Mogyer) and Mager (=Magyer) forms. Latin isn't able to note many Magyar sounds.
The faction name might be Hétmagyar (modern), Hetumoger (12th century Latin) or Hétumogyer (12th century form, modern spelling). It means Seven Magyars, a reference to the 7 tribes.
Otherwise the Magyar (Mogyer) Tribes also suitable. Magyar Törzsek in Hungarian.
Or simply Mogyers-Magyers.
Religion
Shamanism. The priest called táltos (modern term) or tátus, tátos (archaic and old folksy forms). After taking Christianity (~1000) the táltos takes the 'pagan magus' role.
The Kavars possibly had some muslim warriors in a small ratio.
Team roster to the 9th-10th centuries
Some written resources
"... Now we'll speak about the system and order of the Turkics (that's how the Magyars are called in the Tactics), who have little or no difference from those of the Bulgars. This tribe is numerous and free-loving and has only one care, neglecting all other comforts and prosperity - to show courage against its enemies..."
"... They are armed with swords, mails, bows and spears. Due to this most of them have a double weaponry in the battles, by wearing their spears on their shoulders and holding their bows in hands, using one or the other, depending on the case they have at hand. When they are chased, they overcome mainly with their bows.
Not only they themselves are armed, but also the horses of the notables are covered in front with iron or felt.
They pay great care and practice a lot in shooting from their horses."
Western sources mentioned especially "horn bows", javelins or rather (cavalry) spears and leather caps or helmets (galea). The spear here is short 2-2,5m and not a knightly lance.
Suggested army list:
Cavalry:
*Bők (Bodyguard unit) (lamellar or mail armor, round shield, longer spear and sabre) heavy horses with metal breastplate. Bows as decoration. But they can be imaginable as armored horse archers, too.
*Rusz testőrök (Rus/Varagian Bodyguards). Saint Stephen possibly had them and not Magyars. Maybe the earlier rulers did, too.
*Válogatott harcosok (chosen warriors) (good leather armor, steppe gambeson or mail, composite bow, sabre, small round shield) better unit. fast pony with mainly felt breastplate. This unit represents simply richer warriors who can afford some armor.
*Ínek (~ the poors or commoners) (leather 'coat', steppe gambeson or kaftan, composite bow, short spear, 2m) If you want a military name use the 'lovasíjászok' (=horse archers) term, or Lövők (shooters). fast pony
*Csikósok (=Wranglers) (young boys, composite bow, fokos axe) instead of peasants. fast pony
*Válogatott kavarok (chosen Kavars) (lamellar armor or mail, composite bow, sabre, small round shield) better unit
*Kavarok (from the 3 allied Khazar tribes) (composite bow, small maces and fokos type axes, maybe shield, kaftan, steppe gambeson and mail coats) joined around 830, later the chronicles called them 'Black Magyars' in the 11th century.
*Besenyők (=Pechenegs) settled in the Carpathian basin in 931, some years after 955, in the reign of Saint Stephen and many times later. They appeared in smaller numbers. Without the lack of exact sources one tribe might be OK. They were horse archers like the rest. Unlike the Magyars they used small headed maces, too.
*German knights. When Saint Stephen married Gisela (996) the Bavarian princess, many German knights came to Hungary with their troops.
Spear, war-axe (fokos type) and small maces were the cheaper weapons. Spears were about 2 meters long.
Infantry:
Dismounted version of cavalry units
30% of the cavalry should be Kavar. They were 3 Khazar tribes possibly Kwarazmians or Alans in origin.
Magyar and other steppe settlements should be without walls this way they can defend them with cavalry.
Székelyek (=Szeklers)
The origin of the Székelys are disputed. According to the legends they were native in the Carpathian basin, mainly in the Hungarian Lowlands (near Várad). We might accept one thing they were here earlier than the Magyars. If your mod starts around the conquest of the Magyars (895) they might be present in the Carpathian basin. If earlier it is best to skip them and use only Avars. Their first known name was Sicul in the Latin source.
Székelyek (=Szeklers) (composite bow, fokos war axe, kaftan, leather armor or coat, steppe gambeson). fast pony
Székely előkelők (Szekler “notables”) (good leather armor, mail or lamellar armor, composite bow, sabre) better unit. heavy horse with felt or leather breastplate
Their number should be one tenth compared to the Magyar army (Magyars+Kabars).
You should use the armors which suits better to your game. If you follow Osprey and MTW you should add more metal armor to these guys, too. Helmets can be any type from the steppes, they need leather or chain “nape protector”.
A modern military historian (B. Szabó János) suggested the notables might used silk armor instead of metal. It was lightweight and similarly effective. He mentioned this kind of armor was used by Greeks, too.
They had a lot of horses so the horsemen should be cheap compared to the infantry. This can be an advantage compared to settled factions.
Horses of Bodyguards and Válogatott vitézek: akhal teke http://www.akhalteke.org/web/karakum...tures!OpenView In short: bigger horses.
The rest used steppe horses which looked like the taki horse http://en.wikipedia.org/wiki/Przewalski's_Horse, hucul http://en.wikipedia.org/wiki/Hucul_pony or similar.
The names and the armaments may changed e.g. shields can be ignored. Sources rarely mention shields. Or use the '1' modifier in the comment of the shield model group.
Names
Till the age of Saint István (Stephen) and the early christianity
Spoiler Alert, click show to read:
From ~1000 you may use the Magyar mod name list without surnames. In some cases you need to add some extra names to rulers or other important persons.