Note, I haven't tried it, but should work
go on the EB\data\export_descr_unit.txt and past at the end of the file

Code:
;UBXXX
type             arabian cavalry saba citizen noble
dictionary       arabian_cavalry_saba_citizen_noble      ; Abbir Ezra'him
category         cavalry
class            heavy
voice_type       General_1
soldier          arabian_cavalry_saba_citizen_cavalry, 20, 0, 1
mount            heavy horse
mount_effect     elephant -1, chariot +2
attributes       sea_faring, hide_forest, very_hardy, general_unit, no_custom, 
formation        1.5, 4, 3, 6, 4, square
stat_health      1, 1
stat_pri         4, 30, no, 0, 0, melee, simple, piercing, spear, 160 ,0.33
stat_pri_attr    ap
stat_sec         9, 15, no, 0, 0, melee, blade, slashing, sword, 0 ,0.225
stat_sec_attr    no
stat_pri_armour  5, 11, 3, leather
stat_sec_armour  0, 0, flesh
stat_heat        1
stat_ground      0, 0, -2, -2
stat_mental      17, impetuous, trained
stat_charge_dist 30
stat_fire_delay  0
stat_food        60, 300
stat_cost        1, 3347, 837, 95, 311, 3347
ownership        thrace, greek_cities, macedon, romans_julii, romans_brutii, numidia, carthage, britons, gauls, scythia, germans, egypt, seleucid, parthia, romans_scipii, dacia, armenia, spain, slave, saba,
the unit is 20% less numerous than a standard saba medium cavalry and recruting/mantaining it is 20% more expensive (updgrading armor and weapon is unchanged)

copy this EDU on EB\sp game edu backup\


EB\Data\text\export_units.txt
Code:
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{arabian_cavalry_saba_citizen_noble}	Parashim Ezra'him (Sabean Noble Guard Cavalry)

{arabian_cavalry_saba_citizen_noble_descr}
Historically, the Sabaean urban population was, besides Arab levies, the only other major component of their cavalry divisions. Hailing from a highly urbanized society, these men hailed from both small and large settlements, many helping to work royal land grants, a few riding horses provided by stables owned by their local High Priesthood, and some even enrolled in the forces of semi-independent city commanders. They were skilled veterans, their service during Sabaean campaigns leading them into the rugged mountains North of their well watered and fertile lands, fighting raiders and marauding tribes almost as a way of life. For this service, their pay was good and their lives away from campaign were fairly comfortable, but their strong association with the High Priesthood from engrained childhood perceptions to livelong economic and social relationships, leave their loyalty and dedication beyond reproach.

{arabian_cavalry_saba_citizen_noble_descr_short}
Raised from the urban population of Sabaean society, this veteran cavalry corps has close ties to the Priesthood and fights raiders and marauding tribes almost as a way of life.

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modify it as you want, the name that will appear in the game is Parashim Ezra'him

on EB\DATA\export_descr_buildings.txt
search "-RECRUITABLE GENERALS-" and past immediately under
Code:
recruit "arabian cavalry saba citizen noble" 0 requires factions { gauls, scythia, romans_brutii, britons, dacia, thrace, romans_scipii, spain, greek_cities, macedon, parthia, carthage, numidia, egypt, seleucid, pontus, armenia, romans_julii, germans, saba, } and hidden_resource EA and hidden_resource E and hidden_resource n1 and hidden_resource n2 and hidden_resource n4 and hidden_resource y8
recruit "arabian cavalry saba citizen noble" 0 requires factions { gauls, scythia, romans_brutii, britons, dacia, thrace, romans_scipii, spain, greek_cities, macedon, parthia, carthage, numidia, egypt, seleucid, pontus, armenia, romans_julii, germans, saba, } and hidden_resource EA and hidden_resource E and hidden_resource y1 and hidden_resource y2 and hidden_resource n4 and hidden_resource y8
recruit "arabian cavalry saba citizen noble" 0 requires factions { gauls, scythia, romans_brutii, britons, dacia, thrace, romans_scipii, spain, greek_cities, macedon, parthia, carthage, numidia, egypt, seleucid, pontus, armenia, romans_julii, germans, saba, } and hidden_resource EA and hidden_resource E and hidden_resource n1 and hidden_resource y2 and hidden_resource n4 and hidden_resource y8
recruit "arabian cavalry saba citizen noble" 0 requires factions { gauls, scythia, romans_brutii, britons, dacia, thrace, romans_scipii, spain, greek_cities, macedon, parthia, carthage, numidia, egypt, seleucid, pontus, armenia, romans_julii, germans, saba, } and hidden_resource EA and hidden_resource E and hidden_resource n1 and hidden_resource n2 and hidden_resource y4 and hidden_resource y8
recruit "arabian cavalry saba citizen noble" 0 requires factions { gauls, scythia, romans_brutii, britons, dacia, thrace, romans_scipii, spain, greek_cities, macedon, parthia, carthage, numidia, egypt, seleucid, pontus, armenia, romans_julii, germans, saba, } and hidden_resource EA and hidden_resource E and hidden_resource y1 and hidden_resource n2 and hidden_resource y4 and hidden_resource y8
recruit "arabian cavalry saba citizen noble" 0 requires factions { gauls, scythia, romans_brutii, britons, dacia, thrace, romans_scipii, spain, greek_cities, macedon, parthia, carthage, numidia, egypt, seleucid, pontus, armenia, romans_julii, germans, saba, } and hidden_resource EA and hidden_resource E and hidden_resource n1 and hidden_resource y2 and hidden_resource y4 and hidden_resource y8
recruit "arabian cavalry saba citizen noble" 0 requires factions { gauls, scythia, romans_brutii, britons, dacia, thrace, romans_scipii, spain, greek_cities, macedon, parthia, carthage, numidia, egypt, seleucid, pontus, armenia, romans_julii, germans, saba, } and hidden_resource EA and hidden_resource E and hidden_resource y1 and hidden_resource y2 and hidden_resource y4 and hidden_resource y8
recruit "arabian cavalry saba citizen noble" 0 requires factions { gauls, scythia, romans_brutii, britons, dacia, thrace, romans_scipii, spain, greek_cities, macedon, parthia, carthage, numidia, egypt, seleucid, pontus, armenia, romans_julii, germans, saba, } and hidden_resource EA and hidden_resource C and hidden_resource y1 and hidden_resource n2 and hidden_resource y4 and hidden_resource y8
this will make the Arabian Noble Guard recruitable in Diamat, Qataban, Saba, Hadramaut, Zufar, Maketa, Gerrhaia Arabia and Nabataia

that should do