The only free and comprehensive online etymological dictionary of the Spanish language
recordar (Verb) "to remember"

12th cent. From Latin recordari 'id.,' from re- "back" and cor "heart" (see corazón).

Romance: Western Vulgar Latin: Portuguese recordar, Catalan recordar, French recorder, Italian ricordare
recuerdo m. (Noun) "memory"

13th cent. From recordar.
red m. (Noun) "network"

11th cent. From Latin rete "net." From Proto-Italic *rēti- 'id.' Of obscure origin. Compare Ancient Hebrew rešet "net."

Romance: Western Vulgar Latin: Asturian rede, Portuguese rede, Galician rede, French réseau, Italian rete ; Eastern Vulgar Latin: Romanian rețea ; Sardinian: reta

Semitic: Ugaritic rθt "net," Ancient Hebrew rešet 'id.'
rededor m. (Noun) "surrounding"

Metathesis of Old Spanish derredor. From de and redor.
redor (Adverb) "behind," "back"

12th cent. Obsolete. Originally used as a preposition until the 13th cent. From Latin retro. Certainly from re- "back" and possibly the ablative of -teros "towards." See re- and -tero- respectively.
referible (Adjective) "referrable"

From referir and -ible, an adjective-forming suffix indicating possibility.
referir (Verb) "to refer"

15th cent. From Latin referre "to bring back." From re- "again" (see re-) and ferre "to bring" (see -fero).

Romance: Western Vulgar Latin: Portuguese referir, Catalan referir, French référer, Italian riferire
regalar (Verb) "to gift"

Very late 15th cent. Borrowed from French régaler 'id.,' a verb created from regal "feast," Old French rigalle. From ri- "again" (of the same Latin origin as re-) and galer "to make merry," from Frankish *wala "good." From Proto-Germanic *wala 'id.' From Proto-Indo-European *u̯elh1- "to desire."

Italic: Latin velle "to want," Umbrian veltu "he ordered," Venetic leno "voluntary act"

Germanic: East Germanic: Gothic waljan "to choose;" North Germanic: Old Norse velja "to choose;" West Germanic: Old High German wellan "choice," Old Saxon wellian 'id.,' English to will

Indo-European: Balto-Slavic: Old Church Slavonic velěti "to want," Russian velét' 'id.,' Czech veleti "to command," Slovene velẹ́ti "to want," Lithuanian vélti "to allow;" Hellenic: Ancient Greek λῆμα (lêma) "will;" Indo-Iranian: Sanskrit vr̥ṇīté "he chooses," Old Avestan var- "to choose"
regalo m. (Noun) "gift"

18th cent. From regalar.
regir (Verb) "to rule"

14th cent. From Latin regere "to rule," "to lead." From Proto-Italic *reg-e/o- "to direct." From Proto-Indo-European *h3reǵ-e/o- 'id.'

Romance: Western Vulgar Latin: Portuguese reger, French régir, Italian reggere

Italic: Umbrian rehte "right"

Indo-European: Celtic: Gaulish regu-c "I stand up," Old Irish a-t-raig "to stand up," Middle Welsh reaf 'id.,' Old Breton gurre "to raise," Middle Cornish gorre "to put;" Germanic: Gothic -rakjan "to stretch," Old Norse rekja "to wrap," Old High German recken "to stretch," Old Saxon rekkian "to explain," Old English reccan "to stretch;" Indo-Iranian: Sanskrit raj- "to direct," Old Persian rāsta- "straight," "justice;" Tocharian: B räk- "to extend"